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Q: How much pressure to be maintained for fire fighting pipes testing?
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How do you decide to use seamless pipes?

Steel pipes for high pressure is used.


Why are my pipes vibrating and then when I start to open the faucet up it stops?

pressure in pipes


Can low pressure on the hot water side be a cause of frozen pipes?

Pressure has nothing to do with pipes freezing. It is just exposure to cold.


What is the different between a non pressure pipes and gravity pipes?

There is no difference they are both cool


How do you calculate allowable leakage for HDPE pipes uring pressure hyodro pressure testing?

0.2 x(dia of pipe)x(length of pipe) For examble if you have 100mm diameter pipe and 50 m length .. 0.2x0.1x50= 1 litre and this is your allowable value


Where are erw pipes used?

low pressure lines


How does water pressure on the ground floor compare with water pressure on the second floor?

Should be the same, when your home was originally built, it was pressure tested (without water). This assures that there is no leaks in the entire home, if the plumber knew what he/she was doing they designed the system to have the larger dimension pipes closer to the water meter and if designed correctly the furthest pipes from the water meter are the smallest dimension pipes in the house. This assures that when valves are opened in different parts of the house there is a greater likelihood of a maintained service pressure. Of course if you open a downstairs faucet (say a kitchen sink) and are doing laundry (in the basement) and then try to take a shower in an upstairs bathroom you will notice a drop in pressure.


What are Glass Reinforced Pipes?

GLASS REINFORCED PLASTIC (GRP) PIPES give all details relating to the specifiaction,process of manufacture,testing norms,usage and manufacturers of Glass Reinforced Pipes in India


Why do pipes shutter when well pump shuts off?

You have air in your pipes, possibly a ruptured bladder in the pressure tank


What is trapped pressure?

The physical containment of fluids or gases under pressure. This can include tanks, pipes and hoses.


How do I keep my sink from building up pressure?

You should check your sink pipes if there is something clogging the pipes and creating that pressure. If you are unable to locate the problems, you should contact a plumber to inspect your sink.


What has the author Balvant Rajani written?

Balvant Rajani has written: 'Long-term performance of ductile iron pipes' -- subject(s): Water-pipes, Iron pipe, Testing