Hi all, I'm installing an open vented system for my hot water (bad mains pressure rules out an unvented system) and I'm wondering if I can get away without a pump. I'm going to have 2 bathrooms run off the tank and the showers are rated for 0.1 bar. I figured if i have a 28mm pipe from the tank which then becomes 22mm to feed the hot water and showers /bath and a 15mm for the toilets and sinks, then there should be enough flow to allow 2 showers to be used (max flow of the showers is 12 litres a minute), or a shower and a sink, without the pressure dropping to a dribble.
Is my logic correct, or would I need to install a system pump to ensure consistent flow?
Thanks!
Is my logic correct, or would I need to install a system pump to ensure consistent flow?
Thanks!
