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I doubt the basin would be anywhere near the eves
Twin pump not sending water to upstairs bath and taps.
- Thread starter Tones1966
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Usually the eves are the overhang of the roof trusses/rafters that extend out over the wall of a house. Presuming the eves in this case are the spaces/rafters in behind the converted loft walls, then it would be fair to presume the floor of the converted loft is on those same rafters/joists and at the same level.
If that's the case and the basin is on that same loft floor either on a pedestal or vanity then that will make it at least 800mm odd off the loft floor so the hot tap on the basin will be at least 650mm above the base of the cistern if the cistern is 6" above those rafters?
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Don't know Madrab,pics would be useful. I suspect the OP's description of eves may be misleading.
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Yes sorry, the basin is on a pedestal and is around 800 mm off of the loft floor. The bath obviously lower! Pic attached. Excuse the mess..in the middle of decorating!
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I turned off the shower and then the hot taps for 5 seconds and back on and they run fine. I tried this several times at differing intervals and it seems to stop working completely after about 30 seconds following turning them off and back on again. If that makes sense?
When you turned on the hot taps did the pump kick in immediately or was there a sort of opening initial flow and then the pump kicked in
An ST monsoon Universal twin pump, one excellent pump.
First place to start would be one of 2 things, either the strainers need cleaned and/or the small Expansion Vessel (EV) on the top of the pump needs re-charged (0.9bar for a 3bar twin). Servicing both are covered in the MI.
ST Monsoon Universal MI
First place to start would be one of 2 things, either the strainers need cleaned and/or the small Expansion Vessel (EV) on the top of the pump needs re-charged (0.9bar for a 3bar twin). Servicing both are covered in the MI.
ST Monsoon Universal MI
You need a negitive head pump.
Andy
Andy
It's a universal monsoon pump Andy - AKA - can be used in either a Negative or Positive head
I know, I only read the first couple of answers. 
Andy
Andy
My guess is that somewhere in your pipe run to the hot tap there is a point higher than the TWL in the header tank or there is a point in system that allows an air lock to develop after 30seconds thus preventing any flow and activation of the pump. Pipe run needs to be crawled over and analysed. Why it worked before and not now???? Has the level in your header tank dropped lower than normal.
If it is what I think it is, then typically when the mini EV loses pressure, especially if it hasn't been used for ages, there's no longer enough pre-charge pressure to create the water movement needed to start the pump. The shower downstairs works fine as it's under positive pressure so there's enough gravity flow to activate the switch but not when it comes to the tap(s) in the loft above the CWSC, which is under negative head. It needs the EV pre-charge to hold the water under positive pressure and when the hot tap is opened the pressure creates enough flow to trip the switch.
Has your loft shower a flexible hose if so turn the hot on and lay the hose on the floor and see if you get any flow out of the rose, better still take the rose off
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