Plumbing Noise Diagnosis Service Guide

Scope of Works

• Interview & survey occupants to pinpoint when/where banging, whistling or humming occurs.

• Pressure & flow tests on cold, hot and heating circuits to spot excess pressure or cavitation.

• Listen & trace with acoustic equipment and stethoscope to isolate loose clips or hammer points.

• Inspect fixings in loft, floor voids and cupboards; tighten or add pipe‑clips and rubber cushions.

• Fit devices such as mini expansion vessels, water‑hammer arrestors or pressure‑reducing valves as required.

• Bleed/ purge air‑locks and balance system; recommission and verify quiet operation.

• Provide written report with readings, photos and long‑term prevention advice.
  

Typical Cost (inc. VAT)

Time on Site

1 – 3 hours for a single dwelling. Extra time if: pipework is concealed behind tiled boxing, multiple circuits need balancing, or a main pressure‑reducing valve must be cut into the incoming feed.

Questions to Ask Your Trade

1. What diagnostic tools (acoustic mic, thermal camera, pressure gauge) will you bring?

2. Will you record pressure/flow readings before and after the fix and share the data?

3. Are parts like water‑hammer arrestors or PRVs included in the quoted price?

4. How will you access hidden pipe runs and who makes good any holes afterwards?

5. Do you offer a fixed price if the job runs beyond the first hour?

6. What warranty covers both labour and any noise‑control devices you fit?

7. Can you supply evidence of public liability insurance and relevant accreditations (WaterSafe/CIPHE)?
   

How to Avoid Surprises

• Clear access to loft hatches, airing cupboard and under‑sink pipework.

• Reserve close parking for a van carrying diagnostic kit.

• Note recent boiler pressure changes or appliance installs that may help diagnosis.

• Tell the plumber if you have already used chemical inhibitors or silencers in the system.

• Confirm whether evening/weekend visits trigger emergency rates.