is unusual, although it may be required by your local plumbing code. Looking for some advice. One common use of this type of safety pipe is found in toilet tanks. What could be the cause of the problem ? The attic pressure tank was open to the atmosphere and often itself included an overflow pipe which would permit any excess water (or pressure) to flow out of the tank and out of the building, perhaps through a building wall to the outdoors. Fully lagged pipe-work, again to stop it freezing in winter causing leaks. Noticed that there is a continuous drip of water from that overflow pipe. You can change direction of pipe easily by breaking joint and removing all except the nut and change fitting body from straight to elbow etc. The overflow pipe is there to prevent a water container from overflowing. Use a 3-in.-to-4-in. It should only be there to stop hydraulicing when a loo is flushed, i … The water rises in the drip pan and triggers the pump once it reaches a certain point. Plumbing questions, answers, tips and tricks. The water rises in the drip pan and triggers the pump once it reaches a certain point. When it is windy outside (I live on a hill) the water in the attic tank splashes about, does anyone know how to reduce the draught coming up the overflow pipe. ...1/2 inch feed to ballcock, 2 x 3/4 ( or 1 inch at worst) inch outlets near tank bottom. to a 4-in. If you are wondering how this TRP does valve is respons… Thanks in anticipation. What could be the cause of the problem ? The overflow pipe is a straight run (no bends or angles except the 90 degree connector) approx 3m long, across the roof space approx 30 degrees below the horizontal and it emerges outside under the eaves. The hole towards the top of sinks is there to prevent water overflowing onto the floor and header tanks have a pipe that works in the same way. It could be that tank or it could be a toilet overflowing. The overflow from the cold water tank is piped all the way out of the build. A fully insulated tank with the base exposed to a part of the attic floor which has been left un-insulated to allow the heat from the house below to keep the tank from freezing in the winter. So, this release of its pressure causes your hot water tank overflow pipe dripping towards the floor where the hot water heater is placed. Titan W50 Lid €28.88 Add to cart. Water is coming out of the overflow pipe [ 2 Answers ] The overflow pipe which, I presume, comes out of a tank in the attic is letting water out intermitently. Is this a pump from a well or something? Any help appreciated as the tank is above my bed and the noise can be annoying. Darren's answer also makes a lot of sense. The same general concept is found with a water heater overflow pipe or boiler overflow. Cold water tanks fitted since the early 1990's should meet Byelaw 30 which is designed to prevent contamination of the stored water; this involves having a tight fitting lid and the overflow incorporating a screen to prevent small insects from traveling along the overflow and contaminating the water in the tank. there is no drip from it and it stops when it's level. A fully insulated attic access hatch. Use a 3-in.-to-4-in. Reply to Cold water tank in the attic overflowing in the Central Heating Forum area at PlumbersForums.net. The valve only gets covered in water when water is over flowing. Have already changed the valve and float in the attic. This water travels down a small pipe where it ends up in the drip pan. to browse this site you are agreeing to our use of cookies. How to Deal With a Leak in the Attic. It seems to mostly drip at night and in the evening so I'm going to get up there tonight if I can and have a look once it's actually dripping. Use the attic access in the garage right next the drain pipe and see if that is the drain attached to the Air Handler itself or the emergency drain attached to the drip pan. It can be yes, a customer had a tap fitted and another plumber had changed the float valve twice. It stops momentarily when the water is used (when I flush for instance) but then come up again.