Stop showing yours, it`s still stored water in what is normally a 36 x 18 hot water storage tank, the only difference is that the header tank is integrated above the cylinder. If you would like to discuss integrated combi & Thermal store cylinders. I will be happy to oblige. Maybe unvented cylinders, I`m up for that. Out of your depth mate , leave it before you embarass yourself further.
Why would I ? most of the comedians that used to post on here now have their very own ``Don`t I know more than you`` Forum. It`s called the Combustion chamber. I am Gas Safe Registered and been on this site for about 6 years. I m over the moon that all the Egotists have left, this site was always supposed to be a site for DIYe`rs to gain advice but turned into a battle between who had the biggest head. Thankfully all that has moved to the Combustion chamber and we are now hopefully left with the people who are asking the questions.
Your lack of knowledge is embarrasing. Pump manufacturers usually ask for a minimum 50 gallons cold water storage. Irrespective of cylinder size, when the tank empties the pump will run dry, even though the cylinder remains full.
A Fortic or combination cylinder will certainly not entertain a shower pump.
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