Central heating and hot water query

Beeblebr0x

The historical reason for me having an unvented cylinder was so I could have an immersion heater as a backup.

ThisIsWeird

Beeblebr0x said:

The historical reason for me having an unvented cylinder was so I could have an immersion heater as a backup.

That's certainly a valid consideration. Many folk - including me - have combis, tho', and are 'happy' to cope with that risk for the usual benefits: endless hot water, mains pressure, only paying for hot water actually used, saving the space taken up by a cylinder.
Your options would appear to be, stick with what you have, and see if you can reduce the pump noise by, say, a thicker absorbing base, and even an insulated box around it, or perhaps a quieter model. Or, convert to an unvented - mains pressure - hot cylinder, which will surely be £2k-upwards. Convert to combi, which will be ~£3k+

Beeblebr0x

Tried the insulated box and it was hopeless. I'll likely stick with what I've got given the circumstances.

ThisIsWeird

Beeblebr0x said:

Tried the insulated box and it was hopeless. I'll likely stick with what I've got given the circumstances.

Do you know if the sound is vibration-transmitted, or through the air?

Grenage

If it helps at all, the only difference between your setup and mine is that I have an old folded t-shirt under the concrete block.

Beeblebr0x

ThisIsWeird said:

Beeblebr0x said:

Tried the insulated box and it was hopeless. I'll likely stick with what I've got given the circumstances.

Do you know if the sound is vibration-transmitted, or through the air?

Probably both but mostly airborne

ThisIsWeird

Beeblebr0x said:

ThisIsWeird said:

Beeblebr0x said:

Tried the insulated box and it was hopeless. I'll likely stick with what I've got given the circumstances.

Do you know if the sound is vibration-transmitted, or through the air?

Probably both but mostly airborne

Which one is the party wall?

Beeblebr0x

The green wall

ThisIsWeird

Beeblebr0x said:

The green wall

In which case, I am pretty certain a lot can be done to reduce the sound transmission. If neighbourly sound is the only issue here - if that is why you are considering spending £ks on a system change - surely it's worth tackling the obvious first?

Kudos to you for being considerate, btw

I am no sound expert, but one glance shows pipe clips screwed to that wall. Close pump-wall proximity, with no sound insulating betwixt them. A thin rubber mat underneath. Unlagged copper pipes.

I'd unclip these pipes, and mount them on a separate board, with sound insulation between it and the wall. I'd heavily lag the pipes to reduce any vibes and resonance. I'd build up a multi-sandwich block under the pump, and lose the concrete block. I'd even consider ways to have the pump sitting on a wee board that's fully suspended on bungies from above. And I'd box it all in, with sound-foam insulation-lined sides - but ensuring it has enough air inside to provide cooling ventilation to the pump.

Beeblebr0x

I tried boxing in but it's difficult to do so around the various pipes whilst making the box soundproof/allowing for ventilation. I stuck acoustic tiles inside the box but it made little difference. The pipes are clipped to the wall but there's a sandwich of rubber between the clips and the wall. The rubber mat is designed for use with such a pump and the manufacturer suggested mounting it on a breeze block.

I think I've gone as far as I reasonably can bearing in mind there's nowhere else I can relocate the pump without spending a lot more money. Most people make noise, be it from radios or dogs. I'm retired so don't have to shower early, so the inconvenience to the neighbours is minimal.