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Solar Pre-heated hot water - need help getting water to flow Options
#1 Posted : Wednesday, September 07, 2011 1:22:30 PM
Rank: Guest

Posts: 134,494

We live in Maine and our water from well is extremely cold.  We built a greenhouse/sunrrom onto the house and want to use it to pre-warm water from the well before it goes into the hot water tank but we are having a problem and need help figuring out the plumbing aspect. Please see attached picture.

 The well holding tank is located in the basement and the water holding tanks are upstairs in the greenhouse.  The cold water filling the tanks from the well is about 40psi.  The water flows out of the tanks under no pressure, just from gravity – there is no airlock in the lines. The problem is that it isn’t forcing the water out of the tanks – it’s just making the plastic tanks expand and bulge.  The pressure is not forcing the water out of the tanks to run through the pipes below the floor into the hot water heater.  What do I do to get the water to go into the hot water tank under pressure so that it will feed the rest of the house just like it did when it flowed directly from the well?  Do I need to put in a circulator to feed the hot water heater under pressure?  Do I need a check valve to keep the water from the well going into the tanks to be too forceful and expand the tanks?  Do  I need  to strap them down keep the tanks from bulging – will that help to force the water out?  The tanks have 1 ½” inch holes that are plugged on each end, upper and lower.  Should I be using those for the outflow of the water instead of the ¾” holes that I’m trying to use now? 

Any help is greatly appreciated.


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