Hot water takes a while

I googled a bit and found that if I add a hot water re-circulation pump it would help deliver hot water much quicker. I also know tankless water system deliver instant hot water as well. What have others done here to get hot water out quickly. When I turn on the faucet or shower when it’s been idle for a small amount of time(30-60 minutes) the water is cool and takes about a minute to start getting warm/hot. I am wasting a lot of water in that time.

zhideng

in Heating and Cooling 10 years and 6 months ago

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Master Plvmber | 10 years and 6 months ago

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It is in theory. Sometimes you have to add another of those twin tees to another part of the house.

nalusurf | 10 years and 6 months ago

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Looking closer at the literature it seems as though I would just need one check valve installed at the sink furthest from the hot water tank (in my case the third floor bathroom). Is this correct MP?

nalusurf | 10 years and 6 months ago

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Thanks, MP! My issue is really with the showers on the 1st, 2nd and 3rd floors. If I understand this system correctly would this require a check valve to be installed in each bathroom in order to provide the hot water to each shower/sink?

Master Plvmber | 10 years and 6 months ago

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Yes. That’s what it’s made to do. Your sitch exactly, nalusurf.

nalusurf | 10 years and 6 months ago

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MP, I have the same issue. I have a Weil McLain gas boiler with a heating coil (I know, highly inefficient and wasteful. You have lectured me already and I am working on fixing it!) 😉 I am going to correct it with an indirect water heater. However, I am sure this won’t solve my problem of the time it takes for hot water to reach my upper floors. The recirc pump you specified can work in this situation as well? It’s a 3 story home, all floors are on the the same circuit. Thanks!

cmu | 10 years and 6 months ago

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There are on-demand pumps which connect simply (almost DIY) to the riser shut-off valves at sink farthest from the water heater, one available at Home Depot. Some have timers, others (D’mand, Chilipepper (kid you not)) are wired with a push button and you wait for it to stop, which it does when the hot water gets to the pump. Of course, you need an outlet nearby.

landlord | 10 years and 6 months ago

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Master Plumber is correct. I have a 4 story brownstone and my top floor tenants complained that it took 3-4 minutes for the hot water to come up. I installed a pump very similar to what master plumber recommended. The pump starts working when the top floor tenants wake up to take a shower (around 7am) and cuts off at around 8am. At the top floor I have 2 apartments and both tenants take showers at around the same time. Additionally, there is a temp sensor at each of the 2 apartments that cuts off the hot water circulation when the water temp exceeds a certain point. My tenants claim a big improvement…….however, they say that it still takes about a minute for the hot water to come up (i might have to change the timing from 7am to 6:45am). The product I got is made in Canada and I compared it to other pumps available in the market. https://www.google.com/shopping/product/10717614045457649256?q=bur+cam+300521&safe=active&hl=en&gbv=2&oq=&sa=X&ei=RdI_VJavAYa3yASNrYGoAw&ved=0CBgQ8wIwAA

Master Plvmber | 10 years and 6 months ago

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No, you don’t. A check valve and twin tee fitting use the cold water line to push the water back to the water heater creating a continuous piping circuit. The only drawback is it makes some of your cold water warmer than usual briefly when you first turn on the faucet.

Augustiner | 10 years and 6 months ago

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You still need to build the loop through the house for that pump to do its job

Master Plvmber | 10 years and 6 months ago

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The lack of return piping thing has been figured out already. See the product above.

Arkady | 10 years and 6 months ago

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I keep a gallon jug next to the sink & catch the water until it’s hot & then use it in a toilet tank. (I’m not really obsessive, it’s just a game I play to see how very low I can get my water consumption.)

Augustiner | 10 years and 6 months ago

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Recirculation pumps solve the problem, but you need to create a loop throughout the house which is a bigger effort if your walls are closed. You can´t just add it to your existing piping because you need a return pipe from your furthest point of consumption. If your concern is not about a shower but e.g. a kitchen faucet, you might want to consider a local mini tank heater under the sink. Btw: A tankless water heater will deliver hot water slower than a water heater with tank.

Master Plvmber | 10 years and 6 months ago

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A tankless system won’t get you hot water any faster unless you install it at the point of use, i.e. closer to the faucet than your current water heater. You need this:http://www.globalindustrial.com/p/hvac/pumps-circulators/units/grd-comfort-system-hot-water-recirculator-system-up15-10-su7p-tlc-595916-comfort-valve?infoParam.campaignId=T9F&gclid=CJS_99zGr8ECFWVp7AodaE8AJw&gclsrc=aw.ds