Whyexpansion tank istalled in fire fighting system how its works and what is the link of pressure expansion tank with pressure switch
Hello,
Expansion tanks are used in wet or dry fire suppressions as well as other hydronic (heating/cooling) systems to compensate for temperature and pressure differentials (expansion/contraction) in the piping system and to maintain a constant pressure in the system. As liquids heat and cool they will expand or contract. The pressure switch you describe is usually connected to an air compressor that will cycle on and off as needed to maintain the system pressure.
The expansion tank should never be completely filled because liquids are not compressible and can cause excessive system pressurization and subsequent malfunctions or rupture of components (water hammer) or pump seals. Some expansion are equipped with "site glasses" so the water level in the expansion tank can be observed and monitored.
How do you install replacement Watts Watts Nf8 backflow preventer
It screws onto the hose bib before the hose is connected. Its ez ...unless there was one on before. If that is the case you will need to remove the set screw on the old one (drill it out). unscrew it and attach the new one, tighten the set screw until it breaks off and you are done!
My answers are short and sweet. Common sense mostly. If you are trying to get something for nothing...Don't waste my time! Remember if something sounds to good to be true that it usually is. I've spent many years of my life trying to cheat the system and was pretty good at it. This all changed when I discovered that people were doing the same thing to me. What comes around, goes around. Karma! Now I assist people in making win-win deals...that are legit!
Vent pipe connection to Watts 9D-M3 BackFlow Preventer
Every Watts 9-D I have installed had a 1/2" female thread as the vent opening. I think yours is defective. If you have already installed your 9-D, just take it apart at the unions and return the body for a refund. If they complain that the union nuts are missing, have them take the nuts off of the replacement. Good luck!
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