What does P mean on gas valve?

P is probably “pilot” for a standing pilot light – L is presumably for “Lit” or on. Typically you’ll have off, pilot, and on for many gas appliances old enough to have a standing pilot light.

What does S and O mean on a water valve?

Quote from the video:
Quote from Youtube video: So when it's diagonal with the pipe that means your water is shut. Off.

Which way is on and off on a gas valve?

The long side of your handle is parallel to the incoming gas line, which means your gas in on and flowing. By turning the handle perpendicular to the incoming pipe, you are closing the valve and shutting off the gas.

How do you wire a gas shut-off valve?

Quote from the video:
Quote from Youtube video: By hand place one wrench on the shut-off valve and wrench tighten the excess flow valve with the second wrench. Next attach the appliance connector to the excess flow valve.

What is PV and MV on a gas valve?

These are usually a PV (pilot valve), an MV (main valve), and a COMMON wire. In the redundant valve one coil allows gas into the onboard regulator where you can set the output pressure and the second coil allows the output of that regulated gas to the burner manifold. Both have to open for the valve to allow gas out.

What does O and S mean on gas fireplace?

ShenziBanzai • 2 yr. ago. Additional comment actions. open and shut.

How do I know if a valve is open or closed?

Open or closed: When the handle of a ball valve is parallel to the valve or pipe, it’s open. When it’s perpendicular, it’s closed.

Which way do you turn a valve to open it?

When it comes to which way you should turn the valve, keep in mind the old saying “righty tighty, lefty loosey.” In other words, turning a valve clockwise, or to the right, will restrict the flow of water while turning it counterclockwise, or to the left, will allow water to flow.

How do I turn the gas off?

Locate your main gas service shutoff valve. It’s usually the first fitting on the natural gas supply pipe coming out of the ground next to the meter. With a wrench, turn the lever in either direction until it is crosswise to the pipe. Once the gas is turned off, leave it off.

Does it matter which way you install a gas valve?


The valve stem orientation is not critical, however any deviation from vertical is a compromise. Installation upside down is not recommended because it can cause dirt to accumulate by the stem packing. The best practice is to install with the valve stem facing upwards whenever possible.

How does an automatic shut off valve work?

An automatic water shut-off valve detects water either by monitoring flows in the pipe or by detecting water on the floor. When flow is irregular or moisture is detected, the valve will shut off the water supply to your home. These can prevent a significant amount of the damage that water leaks cause.

What is a Watts 210 valve?

Basically, the Watts 210 is an immersion-type valve used to protect against overheating water in a water heater. The valve is installed where the T&P would normally be installed on a water heater and it has a thermostat that goes inside the water heater.

Do gas water heaters have auto shut off?

The main reasons that a gas water heater automatically shuts off are because the pilot light goes out, the pilot light can’t start, or there are problems with the gas supply. Here we look at what you can do to get to the bottom of this issue and make your hot water supply more reliable.

What is the valve on the side of the water heater?

temperature and pressure relief

On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward. The valve is called a T&P valve, or TPR valve, for “temperature and pressure relief.” If all goes well, a TPR valve never gets used intentionally except during testing.

What is T & P relief valve?

T&P valves used on residential water heaters are typically designed and manufactured to relieve pressure at 150 psi and temperature at 210 degrees F. ASME, ANSI and CSA (AGA) approved relief valves protect the water heater from excess pressures and temperatures by discharging water.

How do you adjust a pressure relief valve?

Quote from the video:
Quote from Youtube video: You to lower the downstream pressure loosen the locknut. Next turn the adjusting screw counterclockwise to the desired pressure level as indicated on a downstream.

What is code for water heater pressure relief valve?

Item 10 requires the relief valve to terminate no more than 6 inches (152mm) above the floor surface, a waste receptor or floor drain in order to prevent hot water discharge from being directed onto a building occupant that may be nearby.

Is code for pressure relief valve?

1006.3 Pressure Relief for Pressure Vessels

Pressure vessels shall be protected with a pressure relief valve or pressure-limiting device as required by the manufacturer’s installation instructions for the pressure vessel.

What is TPR valve on hot water heater?

Temperature/pressure-relief or TPR valves are safety devices installed on water heating appliances, such as boilers and domestic water supply heaters. TPRs are designed to automatically release water in the event that pressure or temperature in the water tank exceeds safe levels.