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ConcernedCanuk

(13,509 posts)
2. These are on gravity fed systems, no need for pressure relief valves.
Mon Oct 28, 2013, 12:32 PM
Oct 2013

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A gravity fed system has no check valves, no pumps, no foot-valves like a well.

When the water expands, it simply backs up to ones resevoir, be it an above or below ground tank.

These tanks simply have a vent - to allow the water in (it has to displace the air so a sealed system will not work on gravity-fed systems), and then the air in to allow the water to flow to it's destination.

My neighbors/friends DO have a well with a foot valve, but it merely fills the vented reservoir, which is buried in the ground below frost level, but well above the well level, so they pump up from the well to the reservoir/tank which is 30 feet above the house discharge level, giving them 10# of pressure at the house(each 3 foot lift gives you 1# water pressure).

Here's a link to the first picture's website - as you can see, this is in a trailer, so definitely not hooked up to a pressurized system.

Look closely, you will see a rain gutter/eavestrough on the back side of the trailer's roof - I suspect they catch rainwater - doubt they haul it up on that bicycle.

http://tinyhouseswoon.com/teach-nollaig-tiny-house/

BUT - in response your concern -

IF HOOKING UP TO A SEALED/PRESSURIZED SYSTEM, A PRESSURE/TEMPERATURE RELIEF VALVE IS A MUST.

CC

ps: - I doubt most municipalities or insurance companies would cover or allow the above installations.

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