Hi,

I have had the above pump installed to hot water cylinder for a good 7 months with no issue, recently it has started coming on intermitantley every few seconds when a hot water tap is opened, the only way to stop it is to run a bathroom hot water tap on full for a few seconds. I contacted salamander and they suggested fitting a lightly sprung non return valve to the end of the braided hose as its backing up, my dad thinks its air in the pipes and pump should only be connected to shower water pipes and wouldn't effect hot water taps. Pump is connected to two showers but only one shower is ever used.

Any ideas?

Thanks,

Nick

I've got some pics of the pump set up,

anyone know how to post them here via an iPad?

Cheers,

Nick

Pics would be good, but ain't got an ipad though. Do any of the pipes connected to the pump go up into the loft and down again to the shower?

_________________
Your problem is now our problem

Hi,

Cheers for your reply,

They go under the floor to the one we use and the other is directly behind the cylinder.

I'll get the pics on later via a laptop,

Thanks,

Nick

Hi Nick

Sorry to hear you’ve been having problems with one of our pumps. From the information you have provided regarding the fault, it would appear that the pump is experiencing what we call ‘Ram Rodding’.

This may occur when a tap or valve is closed on the system, which in-turn creates a ripple effect throughout the pipework.

The pump you have installed operates off flow rate; the flow of water passing through the pump lifts the floats, which activates the pump. When the water flow is stopped these floats fall and the pump deactivates.

The ripple effect, or water movement, created by closing the taps may be travelling back as far as the pump and / or the hot water cylinder, creating a push-and-pull effect that allows the floats to lift very briefly, but long enough for the pump to sense the water movement and start pulsating. This will be why, although the pump is not connected to the hot water taps, it is still pulsating and how, by opening a hot water tap, it releases the vibration / ripple in pipework.

During these circumstances fitting a lightly sprung non return valve will prevent the water movement back to the pump and thus resolve the pulsating of the pump that you are experiencing.

I hope this has helped but please feel free to contact me to discuss the matter further should if I can be of further assistance. By the way, we can provide the Non return valve if needed. Our technical helpline number, (available to all Salamander customers), is 0191 516 2002. Thanks for choosing a Salamander pump. By the way, you may find our regular [url]‘Ask Big Malc’[/url] blog useful. You can use the blog site to post any questions you may have directly to us.

Kind regards
Big Malc
Salamander Pumps

Big Malc

It's nice to see a manufacturer coming on here with genuine offers of help rather than just trying to spam their products. Thanks for the assistance

Moderator 6

Hi guys,

Thanks for your responses and apologies for the late reply,

Cheers big malc, I'll order the part from the number you supplied.

Thanks again,

Nick

No probs Nick. Good luck with it and come back to me if you need any further assistance. Big Malc

Hi guys,

Which hose does this non return valve go on?

And does it go on the end connected to the pipe work?

Thanks,

Nick

One more thing to note is that the non return valve is a metal compression type fitting but the pipe work coming out of the pump is all push fit plastic,

Is this the right part and do I need to get a plumber in??



Nick

Any ideas guys?

Thanks,

Nick

I'd imagine close to the tap on the hot feed.

what you can't have is a valve on the pipe run between the top of the cylinder and the end of the vent pipe in the loft.