Strange fault

[southcoastboile]

We installed a new booster pump as the old one had packed up and a new bar mixer shower.

if the shower head is he'd down lower the booster pump kicks in. If you hold it up it doesn't.

we couldn't get the same make and model booster pump so I'm not sure if that's the issue. If you put the shower down to activate the pump initially and then put it back up higher to the normal position it works fine.

i was wondering if a larger shower head would do the trick? Or is it something wrong with the new pump or the wrong type?

Thanks for any advise.

 

[stokecity]

So you have to lower the shower head to get the pump to kick in?

Theres negative head.

 

[SimonG]

Not enough head so not enough flow to kick pump in. As said, negative head.

 

[Billy Bob Bob]

Not enough head so not enough flow to kick pump in. As said, negative head.

exactly,op may be able to get over it with a prompt switch,bristan make them,they basically energize the flow switch in the pump

 

[southcoastboile]

Apparently it worked with the old pump though? I did think it might be due to the height of the cws tank but as he said it worked fine before I ruled it out. Perhaps the flow sensor is not as sensitive on this pump? I'm wondering if a bigger shower head would do it as you can lift it up once pump has kicked in and it works okay?
Thanks for all the advise so far.

 

[SimonG]

Additional resistance in the new bar mixer. Stronger double check valves?

 

[stokecity]

Apparently it worked with the old pump though? I did think it might be due to the height of the cws tank but as he said it worked fine before I ruled it out. Perhaps the flow sensor is not as sensitive on this pump? I'm wondering if a bigger shower head would do it as you can lift it up once pump has kicked in and it works okay?
Thanks for all the advise so far.

Was the old pump a negative head pump?

 

[rocketmanbkk]

http://www.bathroomsandshowersdirec...1/Negative_and_Positive_head_pump_diagram.png


For the op to understand

 

[rocketmanbkk]

Apologies. I thought op was a DIYer!! Sorry south coast.

 

[southcoastboile]

Not sure what the old pump was.

That's okay rocketman. I'm not great on booster pumps to be honest.

I might give the bigger shower head a try and see what happens. Jobs turning into a right pain!