Need more info - what is it for? What is the size of the pipe and the pressure differences you are trying to get?
no
The easiest way is to install two pressure gauges (If reducing pressure) either side of the reducing valve, you will then have indication of upstream pressure and down stream pressure, of which you can adjust to suit you process.
pressure relief valve relief the excess pressure which is developed in the syatem, while pressure reducing valve reduces the pressure and supply it to the system.
Install a expansion tank to absorb the pressure caused by expanding water as it is heated.
To regulate the pressure to a pre-determined amount.
no
If you mean by three-valve manifold, then If you apply excessive pressure to your differential pressure transmitter, you could damage your instrument. This is known as over-ranging the transmitter. A three-way manifold valve is a device that prevents the instrument from being over-ranged. It also allows the isolation of the transmitter from the process loop (an option which could be used generaly for maintenance or re-calibration or fitting new equipment). It consists of two blocking valves and one equalizing valve. The blocking valves are for both high pressure and low pressure sides. During normal operation, the equalizing valve is closed and the blocking valves are open. When the transmitter is put into service, care should be taken to ensure that the high pressure is never applied to one side of the Differential Pressure Transmitter. To put a DPT into service using the Three-way manifold valve is to first close all valves. Then, open the equalizing valve to ensure the same pressure will be applied on both sides of the transmitter. Therefore you will have a zero differential pressure. Next, the high pressure block valve is opened slowly (to check for leakage from both sides of the transmitter). The equalizing valve is closed and this locks the pressure from both sides of the transmitter. Now open the low pressure block valve to apply the process pressure to the low pressure side and establish the working of the DPT.
Install a pressure reducing valve
If you don't, the pressure may fracture your pipes or joints.
The easiest way is to install two pressure gauges (If reducing pressure) either side of the reducing valve, you will then have indication of upstream pressure and down stream pressure, of which you can adjust to suit you process.
no.
since check valve holds water in the line can a hand pump be installed between the check valve and water tank?
by equalizing water levels you can assume that the gas you isolated in the chamber is at atmospheric pressure
If you'd prefer lower pressure than 80, install a pressure reducing valve and set it down to desired pressure.
That is the normal sound of the pressure equalizing in the system.
New pressure balance faucet or you can install a pressure balance valve in the water lines behind tub or if you have a crawl space you can install it on the water lines there. But install only too the lines to tub faucet. And they are not easy no matter where you install. I would just tell everyone not to use any water till you are done with shower.
As the plane climbs, the pressure drops, even in a pressure cabin. The pop is your ears equalizing from ground pressure to altitude pressure.