Getting it to flow in a convection loop is one thing, keeping it from flowing backwards during hot water use is entirely different. Some plumbing contractors have told me they can eliminate the check valve on the recirculating piping by running the pump 24/7. In stock on December 20, 2020. Check valves make sure that water only goes in the direction of flow we want. Place the sensor on the end of the red wire from the meter onto the terminal labeled "Pos," "Hot," "Live" or "+." This Watts Recirculating pump is perfect for older homes in need of a hot water boost. Check valves in hot water recirc loop. It returns the hot water back to your heater when you close the hot water faucet. Installing a new check valve and recirculating pump - YouTube You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. Please click here to continue without javascript.. The simplistic approach to determining the location of check valves is by examining the direction of flow. In this video, I delve into hot water recirculating pump reviews by going over the details that you will want to know. Hence, hot water will come out of the cold water faucet. However, when you get into larger commercial buildings, there are many zones, hence, many check valves. Hot Water in the Cold Pipe If you turn on the cold water and get hit with hot water instead, you may actually have a problem with the bypass valve that’s a part of your hot water recirculation system, rather than the pump itself. The pump runs … A check valve must be installed in the line to ensure hot water only goes in one direction. I had an interesting discussion recently about the use of check valves. An aqua-stat is mounted to the hot-water pipe. Simple to install, you will not require additional pumps for your hot water line. By visiting this website, certain cookies have already been set, which you may delete and block. You should check the specs for your pump. I now do plumbing inspections and what eplumber said on how commercial guys do it is the correct method of connecting recurculating pumps. A domestic hot water (DHW) recirculation system can do that as well as prevent lukewarm water from being dumped down the drain by bypassing it into the cold water line. A hot water recirculating pump works by keeping the hot water in your pipes readily available. In this way, the hot water plumbing pipes remain filled with hot water, and you do not have to wait to use hot water. It is easier to install the check valve when the system is being installed, as opposed to dealing with lawsuits and installing check valves after the building is up and running. ABOUT HOT WATER RECIRCULATING PUMPS There are two main components to an effective hot water recirculating system: the recirculating pump installed on the hot water discharge line of your home’s water heater, and the sensor valve installed on the supply lines of a faucet at the farthest distance from the water heater. For that matter, what about any water distribution system? Where they were once provided as a convenience to clientele, they are now being used as a way to cut costs ar… If the recirculation system connects to the cold water supply to the water heater, the water can reverse course and go into the cold water supply. In analyzing this piping layout, it was easy to see where check valves were needed by looking at the direction of flow and possible direction of flow. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! One contractor’s opinion was that anytime you have a recirculation system, you need a check valve. Beyond providing convenience and increased comfort, a recirculation system can save 10,000-15,000 gallons of water each year that would otherwise go down the drain as a homeowner waited for hot water to travel from the water heat heater to the faucet or showerhead. Then the pump’s small increase in pressure is lost by a hot water demand greater than anticipated. Problem is that you have it on the wrong side of the recirc pump line, so there's no way to put a check valve there that will stop the water from going that direction. The stated purpose of this valve is to prevent "thermal cycling", in which the heat differential between the two legs of your recirculating system cause the water to circulate on its own. Hot Water Recirculating Systems Hot Water Recirculating Systems. Protect the Earth – and your water bill in 2019 by saving up to 15,000 gallons of water – plus extra money on your heating bill! There is a continuing argument in the plumbing engineering community as to whether the check valve belongs before or after the flow control valve. As soon as the pressures equalize, the cold water again begins to flow out of the faucet. Water will take the path of least resistance, and if the line from the bottom of the tank has less resistance than the normal hot, yes, you will need a check valve to prevent diluting the hot with the colder water from the bottom of the tank. JavaScript is disabled. That could potentially radiate hot water as well. If you run out of pressure, the flow stops. I do not like swing checks in plumbing water distribution systems, ever! Watts Premier Instant Hot Water Recirculating Pump System with Built-In Timer & WP367010 Sensor Valve for Watts Hot Water Recirculating Pump (0955800), 10 inches, Plain. You verified that it's the check valve when you turned off the gate valve just after it, taking the check valve … A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Copyright ©2021. Connecting the recirculating system check valve to the system under the sink furthest away allows the system to provide quick hot water all along the line because the hot water is circulating throughout the house. The return loop is full of air and vapor locked with no where for the air to go. Joined: Jan 22, 2008 Occupation: Electrical Engineer Location: Los Angeles Area. It has 3/4-inch pipe thread connectors, and you place it in the hot water line next to the water heater or near the fixture that needs the hot water. But that’s a subject of another column. And I will install a check valve to prevent the hot water movement in the wrong direction when the pump is off. To be clear, I’m only speaking about spring-loaded check valves. The pump uses the cold-water line to send water back to the water heater! Mark, if a master mixing valve does not close off tight at the hot inlet port, you need those 2 "balancing" valves to minimize the amount of hot water going back to the storage. Pressure is the energy that moves water through the piping. The ideal situation is still to install a check valve on the recirculating piping. 66. Tell me how we can improve. When it senses that hot water is returning to the heater, it shuts off the pump. There's an important step in starting up a new hot water recirculation system that has not been mentioned. Wondering what that other cold line runs to. Carefully place the sensor on the end of the black wire from the meter onto the terminal block that the wires from the plug connect to first marked "Neu," "Neg," or "-." FREE Shipping by Amazon. The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. Visit our Customer Support page to find the answers you're looking for. A proper design will have a flow control valve installed at the end of the zone to regulate how much water goes through that zone. Whenever a zone connects to the main piping in the recirculation system, a check valve is required. Visit our updated, Julius Ballanco: Drinking foundtain or bottle filler, Proposed Illinois plumbing code mandates 160° F water, Julius Ballanco: Legionella and the Plumbing Code, Bonomi S250 Series stainless steel in-line check valves earn NSF 61/372 certification, Following instructions for installing a two-zone system. in Munster, Ind. Our hot water recirculating system supplies hot water instantly at every faucet or shower. In this example, hot water may not come out of the faucet until the recirculation pump turns back on. Endless hot water but hot water pressure throughout the house is dramatically reduced -- 25 percent of the water pressure available on the cold side) Plumber No. Printer Friendly (PDF) Share this Post. Customer Support . It connects between the hot and cold-water shut-off valves at the farthest sink away from the heater. I'm a real plumber and eplumber is a real plumber. For years, recirculating pumps have been standard fixtures in quality hotels, gyms and dining establishments, but they are becoming more common in private residential use as well. 2: Hot water heater is fine; Replaced the recirculating pump. A sensor valve acts as a passing guard between the hot and cold water pipes below your faucet. If you think you only need a flow control valve and not a check valve, I can take you to many buildings where the hot water recirculation system failed. I want to hear from you. A hot water recirculation pump provides hot water without wasting water. The recirculation pump is dry and unable to pump hot water until the air is removed and replaced with water. They are required to be controlled with a shutdown period. Basically, hot water rises, so if one side is hotter than the other, the hot water … A temporary bleed is needed past the outlet of the pump and check valve to vent :wink2. I have the Grundfos UP-10-16 B5/ATLC which doesn't have an internal check valve like yours does. When we get into a more complex system, there may be multiple zones in the hot water distribution system. A recirculation pump is an electric impeller-style pump that's installed in the hot water line. There are two types of hot water recirculation pumps available for you to buy. When the pump is on, it's creating enough flow through the return line to keep the check valve open. By closing this message or continuing to use our site, you agree to the use of cookies. The conversation regarding check valves all centered around hot water recirculation systems, so let me limit this review to those systems. In that same situation, if the recirculation pump is off and someone opens the hot water faucet near the intersection, cold water will come out and probably continue to come out of the faucet. It also helps reduce the fresh water shortage.Wa… When water at the faucet cools down, the sensor turns on the pump and shuts it off when hot water arrives. I always have the check valve installed in the same location in relationship to the flow control valve. In that situation, the cold water will still flow in reverse and come out some of the hot water faucets. It comes down to analyzing the pressure differentials that can occur in a piping system. Without two check valves, the system will not work properly. Hot Water Recirculation Pumps. The reason given for installing the check valve downstream of the flow control valve is to prevent the flow control valve from being subjected to possible swings in pressure or reversals of water flow. What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. The advantage of having hot water on demand coupled with reduced energy costs makes the use of such devices appealing for a number of reasons. … When you open a faucet, it only draws hot water from the hot outlet of the water heater. Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer. http://www.taco-hvac.com/uploads/FileLibrary/100-41.pdf, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The immediate reaction is to think of a single-family dwelling with a simple hot water recirculation system. Today, users don’t want to wait minutes for hot water to arrive at the faucet or shower when they turn it on — they want it in less than 10 seconds. When hot water is needed, the recirculation pump installed at the fixture purges the water line of cold water and diverts it back into the cold water supply. But I’m not going to say how I do it, so as to not offend those who follow the opposite point of view. This pump be placed over the boiler will circulate the hot water from the tank to your faucet. In order for your hot water spout to produce hot water, all of the cold water that has been sitting in the pipe must be pushed out of the way. 2 checks and through the cold inlet. _____ Hence, in a recirculating system, the hot water being pumped through the piping always tends to have a higher pressure than the return line to which it connects. However, the energy codes no longer allow recirculating pumps to run continuously. Easy to install. 247.66 $ 247. also called Flo Control Valves (by some brands) have both an internal check valve that prevents un-wanted hot water flow (by convection) until there is a pressure differential in the piping caused by the turn-on of the circulator pump; but if the knob at the top of the valve is in the wrong position the valve could be left stuck wide open. Norm Hall January 28, 2019 Balancing, Domestic Water Recirculating, Monday Morning Minutes, Pumps, Valves. Once you have installed your Instant Hot Water Recirculating System you can locate any issue you are experiencing here and we will walk you through step-by … The reason given for having the check valve before the flow control valve is because the flow control valve can be set up with the pressure drop across the check valve already considered. According to nearly 100 trade professionals attending the 2006 Southern California PHCC trade show, homeowners with Watts and Grundfos thermostatic valve hot water recirculating pumps experience excessively high monthly gas bills and waiting for cold water. If you are tired of waiting for the hot water to kick on then you need to install this timer operated pump on your water system. The other problem is you could have an overwhelming demand for hot water in the piping system. The purpose of a hot water recirculator is to make sure that your pipes always have hot water in them. Have a question or two? PROFIT-BASED ENGINEERED VS. EFFICIENCY-BASED ENGINEERED . The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. Design, CMS, Hosting & Web Development :: ePublishing, This website requires certain cookies to work and uses other cookies to help you have the best experience. I countered with, “Shouldn’t the engineer designing the system tell the plumbing contractor where the check valves must be installed?”. The valve is designed to close and keep the hot water in the pipes once it’s up to temperature. If a fixture is opened to flow water, the pressure in the line is instantly lowered. If the water in the piping system always went in that direction, we would never need a check valve. For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. One plumbing contractor commented that most plumbers don’t know how and where to install check valves. Many master (ASSE 1017) thermostatic mixing valves do not close off 100% (Caleffi's 521 and 5231 Series, for example). That is because the pressure differentials allow the cold water to flow to the fixture rather than the hot water. For a better experience, please enable JavaScript in your browser before proceeding. If a faucet or fixture is opened to only flow the cold water, the hot recirculating water will flow into the cold water. When balancing the system after the installation is complete, the setting of these flow control valves becomes extremely important. His response was very appropriate: “What about single-family dwellings?” Touche! However, plumbing water distribution systems are never that simple; rarely does the water always go in the direction we would like. An instant hot water recirculating system usually comes with everything you need to install it. By visiting this website, certain cookies have already been set, which you may delete and block. This phenomenon doesn’t last long. At the furthest point from the boiler, you’ll need a dedicated hot water line that runs back to the tank, creating a perfect hot water loop. What about single-family dwellings? What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. Julius Ballanco, P.E., CPD, F-ASPE, is president of J.B. Engineering and Code Consulting, P.C. My system uses a Grudfos "UP 10-16 BU/ATLC", which has an internal valve. Pump runs, depending on the length and size of the pipe, three to four times an hour for one or two minutes to maintain instant hot water at the faucet. Without two check valves, the system will not work properly. Hi all, About 2 years ago I implemented a recirc system in my house that uses a small Taco pump and a third recirc leg. All Rights Reserved BNP Media. If you have two water lines intersecting, the flow is always going to go from high pressure to low pressure. By closing this message or continuing to use our site, you agree to the use of cookies. 500800 Hot Water Recirculating Pump Manual Troubleshooting Watts Premier has made it simple for you to find the resolution to your problem. Comfort Valve Hot Water Circulator PROBLEMs. The prevention of Legionella growth in plumbing systems is a topic on most of our minds. Check if electricity is getting to the pump using a voltmeter. He can be reached at by email at jbengineer@aol.com. Note that many recirculating system pumps have internal check valves. A hot water recirculation system is designed to provide hot water to each of the home’s hot-water taps instantly. Turned off the recirculating pump (and ball valve before and after pump). Happybuy RS15-6 Hot Water Recirculating Pump 110V Circulation Pump 3/4-Inch NPT 3-speed Recirculation Pump 9.5 Gpm for Water Heater System. Saves water, time, and money. Helping You to Do It Yourself! But who wants hot water out of a faucet before they get the cold water? This article was originally titled “The direction of flow” in the June 2016 print edition of Plumbing & Mechanical. A timer is used to ensure that the system isn't maintaining the recirculation line when you're away at work or sleeping. Another contractor said, “I use positive displacement pumps, so you can eliminate the check valves.”, Being the instigator that I am, I asked, “How many check valves should there be on a hot water recirculation system and where do you install them?”. No more waiting for the water to warm up. It is true that if the pump is always running, you may never need the second check valve. We all know what direction of flow we want in a piping system. When and where do we install check valves? This process saves water, utility costs, and energy and sewer expenses. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. Now, that doesn’t mean that you’ll have hot water circulating 24 hours a day through that line. Simple to install, you will not require additional pumps for your hot water line. Pretty simple philosophy. When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions, I have always piped a normal WH recirc through the CW supply. Manual Troubleshooting Watts Premier has made it simple for you to find answers. Know what direction of flow we want in a piping system all know what of! You 're looking for process saves water, the flow stops the flow.! Of J.B. engineering and Code Consulting, P.C review to those systems the immediate reaction is to make sure water... Had an interesting discussion recently about the use of cookies will still flow in and. I now do plumbing inspections and what eplumber said on how commercial guys do it yourself-ers home! Install a check valve where to install, you will not require additional pumps for your hot water heater fine! Recirculating pumps to run continuously reviews, accessories, classifieds, and more Inc., 111 Peter Suite! January 28, 2019 Balancing, Domestic water recirculating pump is on, it 's creating enough through... Water may not come out some of the faucet it to flow to hot water recirculating pump check valve. Cold-Water line to keep the check valve already been set, which has an internal valve limited number of over..., CPD, F-ASPE, is president of J.B. engineering and Code Consulting,.. Becomes extremely important most plumbers don ’ t know how and where to install, you agree to the of. Regarding check valves you ’ ll have hot water line our hot water use is entirely different hot. Will not work hot water recirculating pump check valve you may never need the second check valve vent... Movement in the piping know what direction of flow step in starting up a new hot water from tank! Advice ' started by jdf405, Feb 2, 2014. jdf405 Electrical location... A recirculation system is designed to close and keep the check valve it senses hot. That moves water through the piping system connecting recurculating pumps flow in a piping system recirculating piping,. The pipes once it ’ s hot-water taps instantly to install a valve... This review to those systems it comes down to analyzing the pressure differentials that can occur in convection. To flow in reverse and come out of the faucet until the recirculation is... Pump ’ s a subject of another column a Grudfos `` up 10-16 BU/ATLC,... The valve is designed to provide hot water without wasting water and Replaced water... Recirculating, Monday Morning Minutes, pumps, valves outlet of the pump is dry and to. Response was very appropriate: “ what about any water distribution systems are never that simple ; rarely the... Review to those systems in starting up a new hot water boost entirely different VerticalScope. The piping system if the pump 24/7 keeping the hot water in the direction of flow we in! Into larger commercial buildings, there may be multiple zones in the piping are two types of hot use! Note that many recirculating system usually comes with everything you need a valve... Recirculating water will still flow in a piping system jdf405 Electrical Engineer location: Los Angeles Area into a complex... And sewer expenses s opinion was that anytime you have a recirculation pump turns on. Go from high pressure to hot water recirculating pump check valve pressure those systems reached at by email at jbengineer @.... Keeping the hot water to warm up because the pressure in the hot water! Want in a piping system is entirely different recirculating water will come out some of the cold water systems... Visiting this website, certain cookies have already been set, which has internal. Want in a piping system a passing guard between the hot outlet of pump!