Browse Forums Bathrooms and Laundry Re: Double shower heads 10May 18, 2009 8:11 pm vvs mand If your having that problem in your existing house, it might be because you have a storage unit that has a pressure limiting valve on the inlet to the unit. If this is the case, it means you have mains pressure on the cold but have limited pressure (usually 600kpa) on the hot. This results in instability when using hot and cold mixed together. A way to remedy this is to put a pressure limiting valve on the cold at the meter so everything is the same pressure. (removing the one at the hot water heater inlet.) In your new house, if youre using an instantaneous unit, you shouldnt have a pressure fluctuation problem if the pipework is done correctly. Just make sure that the unit you purchase is big enough to supply your needs. When you buy your unit, look for a number in the model type unit you buy. It will have 16, 20, 26 or 32 these numbers correspond to the liters per minute of hot water that the unit passes through it. 24 is adequate for a small unit or house, but not for a bigger house with long pipe runs. The more liters per minute the better the flow and less likelyhood of pressure fluctuation problems, you'll have. But ultimately it comes down to how your plumber pipes the house. Also, (this is important) take out the flow restrictors in the shower head as these cause backpressure and interfer with the unit's efficiency, causing pressure fluctuations. Also try not to buy a unit with 50 degrees pre set temp built in. The water will leave the unit at 50 dgrees but by the time it gets to your shower will have lost temp and could be as low as 45 degrees by the time it gets to you.. its far better to not have the preset model, but use a tempering valve, which can be set to deliver water at the shower at 50 degrees. Thanks very much, thats the information we were looking for I'll look into different shower heads and ask the plumber about some engineering and see what he says. Thanks 2 9564 Hi All, about to commence a bathroom renovation and need some advice on subfloor works. Current subfloor is hardwood T&G floorboards on 90x45 joists, but intention is to… 0 5843 Ask yourself if the insurance company will be aware of the Reno. 4 7370 |