Notifications

Clear all

Do primaries need anti vibration clips?

Air Source Heat Pumps (ASHPs)

Last Post by ASHP-BOBBA 13 minutes ago

6 Posts

2 Users

1 Reactions

40 Views

RSS

AdamK

(@adamk)

Reputable Member Member

Joined: 7 months ago

Posts: 122

Topic starter 24/09/2025 10:01 pm

Does primary pipe work run inside the house need special anti vibration clips? Or can the pipes be clipped against wooden joists?

Quote

ASHP-BOBBA

(@ashp-bobba)

Honorable Member Member

Joined: 10 months ago

Posts: 237

24/09/2025 10:17 pm

@adamk generally not, most of the vibration of the system is taken out by the compressor mounts inside the unit, then the remaining vibration should be taken out by the braided flex hoses left to float freely connected to the ASHP, anything remaining after that should be very low. In some cases it may be that there is 2 elbows opposing or a fitting that can be to close to a bend which may cause slightly higher distortion than desired and this can create noise. If you have vibration noises I would gently lean on the ASHP corner to see if this alters the frequency of the noise and then you can determine if its the HP or the water flow, if its the HP I would 1st make sure the ASHP is dead level, this matters.

Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.

👍

ReplyQuote

AdamK

(@adamk)

Reputable Member Member

Joined: 7 months ago

Posts: 122

Topic starter 24/09/2025 10:52 pm

@ashp-bobba it’s a Vaillant 7kw aro plus. It’s not dead level as sat on 2x stack of kirb edging on a path that was laid in 1967 at the back of the house.

there is quite a bit of vibration when I touch the primaries at the back of the heat pump, after the flexis it’s maybe half. Odd thing is even in ECO you can hear and feel it running in the utility 4m away from the outside unit.

other installers have had issues with the 7kw and have asked me to keep them updated if I find a cure. Vaillant have been out to some of these and said all is fine.

ReplyQuote

AdamK

(@adamk)

Reputable Member Member

Joined: 7 months ago

Posts: 122

Topic starter 24/09/2025 10:54 pm

@ashp-bobba is there a way to run the water pump independently from the compressor so I can try and isolate it?

ReplyQuote

ASHP-BOBBA

(@ashp-bobba)

Honorable Member Member

Joined: 10 months ago

Posts: 237

24/09/2025 10:59 pm

@adamk interesting, so I have a client that wants us to investigate the same issue on a 7kW Airotherm and has said other companies cannot fix this vibration issue, we have arranged for him to call us back when his system is under full load and the noise comes back in the winter, I am anticipating the call soon. Once we have looked at this and if we manage to find or resolve this I will try to remember to let you know the solution, perhaps you can do the same if you get yours fixed 1st.

I would start by leveling the ASHP system. What is odd is we have just about finished installing a new 5kW airotherm to our new offices and I chose not to install the anti vibration braided hoses, I have had this running for around a week and even without the hoses there is no vibration what so ever. This may be that there is something different with the 7kW model.

I will investigate.

Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.

ReplyQuote

ASHP-BOBBA

(@ashp-bobba)

Honorable Member Member

Joined: 10 months ago

Posts: 237