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tankless water heater installation with low water pressure

I want to install a tankless water heater in a cabin. the problem is that I've heard they are finicky about having water pressure >=~45psi. the water at the cabin comes from a spring to a 300 gallon holding tank and then goes through a buried 1.5" pvc pipe to the crawl space of the cabin. the PSI in the crawl space is 6psi. I assume I will need some type of water pressure booster to get the PSI up to at least 45. I am looking for a recommended solution. i'd also like something the drains easily as the cabin sits empty (with the water lines drained) during the coldest part of the year.
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Posted 2016-01-30T19:38:52+0000  by cdpresto cdpresto
 
6 psi is pretty low so you might want to think about installing a booster pump and pressure tank regardless of the type of water heater you want to use.  You didn't mention your hot water needs but you might want to do the math on the cost of installing a tankless water heater vs. a traditional one.
Posted 2016-01-31T11:50:09+0000  by Adam444
 
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