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Shrute 02-27-2010 09:50 AM

Hot water recirculator
 
They saw some type of recirculator that uses the existing pipes, it sends water back thru the cold water pipe in order to bring new hot water to the bathroom.for?

AllanJ 02-27-2010 11:15 AM

Quote:

Originally Posted by Shrute (Post 406722)
They saw some type of recirculator that uses the existing pipes, it sends water back thru the cold water pipe in order to bring new hot water to the bathroom.for?

Now if you want really cold water, you would have to wait while the recirculated hot water in the cold pipe gets flushed out.

Alan 02-27-2010 11:17 AM

Quote:

Originally Posted by AllanJ (Post 406776)
Now if you want really cold water, you would have to wait while the recirculated hot water in the cold pipe gets flushed out.

:thumbup:

Basically you have the opposite problem.

Is there access underneath to the piping?

Shrute 02-27-2010 01:05 PM

Yes, there is a 4' crawlspace underneath.

Other than the delay for cold water, are there any other drawbacks to this type of system?

If it matters, their current system is PEX. It's a large diameter which is also a factor in why it takes so long in getting hot water to that side of the house.

plummen 02-27-2010 01:59 PM

how about just running a recirc line with a check valve from furthest point possible on hot water line back to bottem of water heater? :thumbsup:

Shrute 02-27-2010 02:31 PM

Quote:

Originally Posted by plummen (Post 406868)
how about just running a recirc line with a check valve from furthest point possible on hot water line back to bottem of water heater? :thumbsup:

Is that better than the system I described? If so, in what ways?

My Father saw the system in the paper and asked me to look into it.

plummen 02-27-2010 02:33 PM

no pump or electricity required,no affect on cold water lines. :thumbsup:

Shrute 02-27-2010 03:53 PM

Quote:

Originally Posted by plummen (Post 406880)
no pump or electricity required,no affect on cold water lines. :thumbsup:

What circulates the water?

Alan 02-27-2010 04:08 PM

Quote:

Originally Posted by Shrute (Post 406908)
What circulates the water?

A pump. :laughing::laughing::laughing::yes::whistling2:

Shrute 02-27-2010 04:35 PM

Quote:

Originally Posted by Alan (Post 406913)
A pump. :laughing::laughing::laughing::yes::whistling2:

????????

Quote:

Originally Posted by plummen (Post 406880)
no pump or electricity required,no affect on cold water lines. :thumbsup:


SULTINI 02-27-2010 04:35 PM

140 feet a long run. The recirc system you referenced in the beginning is really what you need piping, check valves, pump, and shut off valves.

The system is called a recirculating or tempered loop system where you always have hot water available near the point of service.

plummen 02-27-2010 07:25 PM

lets try this again,since im not good at drawing lines on a computer ill try and type my way through it.put a tee in the line as far up as you can go towards other end of house bring a line back from bottem of the tee to where your drain screws into bottem of water heater ,install check valve someplace close to water heater so it cant force cold water out through the line.
when you open the hot water faucet a lot of the water thats in the hot water line will get pulled back through the recirc line and allow the hot water from the heater to fill the hot water line in place of it.make sense?

plummen 02-27-2010 07:48 PM

1 Attachment(s)
lets see if i can make this picture work of what im trying to explain

plummen 02-27-2010 07:52 PM

Quote:

Originally Posted by Alan (Post 406913)
A pump. :laughing::laughing::laughing::yes::whistling2:

NO PUMP :whistling2: :whistling2: :whistling2: :whistling2: :whistling2:

Alan 02-27-2010 08:17 PM

Quote:

Originally Posted by plummen (Post 407006)
lets try this again,since im not good at drawing lines on a computer ill try and type my way through it.put a tee in the line as far up as you can go towards other end of house bring a line back from bottem of the tee to where your drain screws into bottem of water heater ,install check valve someplace close to water heater so it cant force cold water out through the line.
when you open the hot water faucet a lot of the water thats in the hot water line will get pulled back through the recirc line and allow the hot water from the heater to fill the hot water line in place of it.make sense?

WTF? I've never seen a recirc system work without a pump unless you've created a thermal loop. (this is not possible under the house)

If you just cut a tee into the hot line and no other fixtures are on the return line, how is the hot water going to be drawn into it???? :whistling2:

The heat might radiate a few feet from the furthest fixture into it, but this idea is kind of pointless without a pump of some sort.


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