What is the difference between a high pressure and low pressure ball valve?

High pressure is when a w/c is fed directly from the main supply and low pressure is when it is fed from the storage cistern in the loft.

How does a ballcock valve work?

A ballcock works through using a float with an arm attached that sits on top of the water. As the float rises, the arm pivots round a pin and opens and closes a valve. As the float rises, the valve closes until the required water level is reached and, at this point, the flow is completely shut off.

How do you adjust a ball valve on a water tank?

Bend the arm downwards so that it ends up being curved downwards. Water will now force the float to act on the arm and close the valve at a lower level. Newer style ballcock valves have a screw for adjusting level. Turn the screw clockwise to reduce the level to which the tank fills.

What is a Portsmouth valve?

A Part 1 ball valve or Portsmouth ball valve is a ball valve made to British Standard specification 1212, Part 1. It consists of a piston inside a brass housing, with a float arm secured to the valve via a split pin.

How do you identify a ball valve?

There may be more than one of these, depending on the valve. Lead Free: Some valves will be marked with an “LF” to indicate they are lead free. Manufacturer Information: The manufacturer’s name should be on the valve body. Model Number: The model or part number of the valve is the manufacturer’s identification process.

What is the difference between Part 1 and Part 2 ball valves?

Part 1 and Part 2 ball valves – the main differences On a Part 1 or ‘Portsmouth’ valve, the outlet is on the underside of the valve. However, on a Part 2 or ‘diaphragm’ valve, the outlet is on the top. Water is directed down into the cistern via a small plastic spout which screws onto the valve body.

Do I need a high or low pressure float valve?

use the low pressure insert ( large hole) unless the water pressure is so high that you get water hammer ( vibration) when the valve turns off – thats when you need a HP insert.

What does a ballcock valve look like?

It consists of a valve connected to a hollow, sealed float by means of a lever mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end.

What’s the difference between a Part 1 and Part 2 ball valve?

Why is my water tank constantly filling?

If water is running continuously into the tank, the float valve could be stuck down. Lift it up to release it and check nothing is stopping it from moving freely. If it’s moving with no problems, check the plastic ball isn’t punctured and filled with water. Should this be the case, it will need to be replaced.

What is the difference between a Part 1 and Part 2 float valve?

On a Part 1 or ‘Portsmouth’ valve, the outlet is on the underside of the valve. However, on a Part 2 or ‘diaphragm’ valve, the outlet is on the top. Water is directed down into the cistern via a small plastic spout which screws onto the valve body.

What is a part 1 ball valve?

The Part 1 valve, or Portsmouth valve as it is sometimes known, is similar to its predecessor, the Croydon valve, whose piston moves up and down instead of backwards and forwards. Some cheaply made ball valves have broadly the same design as the Part 1 valve, except that they lack the plastic or metal cap on the end, exposing the piston.

What are ball valves made out of?

Ball valves are present in cold water storage cisterns and feed and expansion cisterns, where they tend to be made out of brass. Those installed in toilet cisterns are usually made out of plastic.

How does a ball valve work on a cistern?

A ball valve or float valve, or less commonly, a ballcock, is a valve which controls the flow of water into a cistern via a plastic or metal float on the surface of the water. When water is drawn out of the cistern, the float falls with the water level.