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Air in water line |
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Air
vent/ Eliminate air
build-up in water line
Add air vent to high point on
plumbingEliminate banging pipes caused by air inside line. Frequently found with recirculation systems so pump lasts longer, runs quieter Required with solar installation. Install Tee with 1/4" reducer bushing. Air vent is usually installed at high point in plumbing line. Air in water heater... You can take care of air or gas that is generated in the heater when heater is unused for weeks at a time by adding a vent at the top. This is done by installing a "T" in the hot outlet so that the side port on the "T" is facing sideways. Now take your hot water to the house from the side port. At the top port, bush down so you can install a float vent. These usually have 1/4 or 1/8 inch threads. With hard water, the vent will plug periodically: clean with white vinegar Buy: Air vent/ Float vent Resource: Air vent .pdf |
 | Spirovent
is much higher cost but designed to remove air from a relatively fast
flowing stream, while a standard air vent shown above isn't. Buy: Spirovent Resource: Spirovent pdf |
 Larger image Best design |
Air
vent for
recirculation system Often, recirculation pumps cause air bubbles as the impeller spins inside the water pipe Air vent has 1/4" pipe thread/ install ordinary plumbing tee and use 1/4" reducing bushing / use teflon tape on 1/4" pipe thread Install at highest point in recirculation loop Air bubbles can cause pump, or plumbing pipes to make noise Air bubbles can cause water to stop circulating Air will shorten life of pump Buy air vent: Air vent/ Float vent Resources: Recirculation system for tankless How to install recirculation system |
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Resources: Questions to ask before buying solar water heater Air in solar water heater/ pdf Solar water heater installation/ pdf |
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Install
air chamber at each faucet This can help eliminate pockets of air in the pipe Pipes bang Pipes bang because water does not compress. Water is moving through pipes and around elbows. Turn tap off, and sudden stop of moving water causes pipes to shake, and bang into boards and drywall inside wall, causing sound. This can loosen pipe joints, and damage water heater, etc. Action: Turn water taps off slowly, add air chambers at each facucet (or buy water hammer arrestor), lower water pressure to less than 80 psi, add pressure reducing valve on cold water line before water heater. Household Air chamber is usually 18" tall and located behind walls on both Hot and Cold water lines at each faucet, and washing machine, etc. Or install larger diameter pipe for air chamber, and make it shorter. Buy: Water hammer arrestors at Amazon Resources: Water hammer |
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