Hot Water Overflow Pipe On Roof

Once the thermostat turns off the water is no longer expanding and no water should discharge from the overflow pipe.

Hot water overflow pipe on roof.

For a 180l hot water cylinder this could be as much as 5 4 litres. It will be made of either plastic copper or lead and usually leads out through the eaves and soffits. In these circumstances its perfectly ok for the overflow pipe to discharge water nb some cylinders do not have a relief valve just a pipe through the roof. Well if the temperature pressure relief valve is defective that means the tank is prone to some sort of damage.

Note it is normal for the pipe to overflow a little bit as the cylinder gets to temperature and water expands but not all the time. When rain water was low we switched over to the bore supply which caused water to dribble out of the roof top hot water cylinder overflow requiring an adjustment to the ajax valve every time we changed water systems. A constant drip in your tpr valve is an indication we must know about. When water is heated it expands.

In my last house i had two water supply systems. The tank supplies your bath and basin taps and your hot water cylinder with water. 1570 posts uber geek trusted 113989 4 feb 2013 09 46. Hot water cylinders are designed to relieve expanded hot water through an open vent pipe overflow on the roof or by way of a relief valve and pipe to an outside wall or drain.

The overflow pipe and t p valve can be considered as a package deal that s why they need to both be checked when leaks are present. If the feed pipe is blocked the water from the system can be pumped over through the swan neck pipe into the feed tank. Gravity feed rainwater from a header tank and pressure supply from a bore. Its a bit unlikely but can happen just with the hot water being heated up.

The water sensor alarm should be on the top priority while installing cold hot water heater overflow pipe leaking and hot water tank overflow pipe dripping coming out of overflow pipe and the hot water tank overflow. Gas water heater turn the dial off from the bottom of the water heater. So this release of its pressure causes your hot water tank overflow pipe dripping towards the floor where the hot water heater is placed. The cold water feed and expansion tank overflow pipe runs from the large water tank in your loft to the outside of your house.

When heated from cold the volume of water can increase by as much as 3. A bit of research says it will likely be a broken old pressure release valve likely triggered by the. This way you have less water sitting in the pipe above the roof but the pump will boost the pressure when you open a tap. Try putting the hot water on by itself and watch to see if the water comes out through the swan neck pipe above the little tank.

Turn the power off. For the past few days the water chimney type pipe on the roof has been leaking a constant stream of water.