# JaJ plumbing and heating

JaJ plumbing and heating is a plumber in Dumbarton. Rated 5.0/5 from 3 public reviews across 1 review source. This is the MyTrustedTraders public-evidence profile for this trader, with independent reviews, credentials and registry data from named public sources, no ads, and no paid placement.

Trust Score: 22 out of 100, with a caution: only 3 reviews held yet. A small public record keeps the evidence thin, and the score reflects that.

3 reviews in the last 12 months.

## About
JaJ plumbing and heating are Heating Engineers based in Dumbarton and cover surrounding area including Dumbarton, Renton and Cardross.

## Public review evidence (by source)
| Source | Average rating | Reviews |
| --- | --- | --- |
| MyJobQuote | 5.0/5 | 3 |

Rated 5.0, in line with the local average for plumbers in Dumbarton. Across 5 plumbers in Dumbarton, the typical rating is 4.9 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.

Most recent review: 4 months ago.

## In customers' own words
_Verbatim quotes from this trader's public reviews, each attributed to its source:_
> "Very quick response,very professional and fixed within half hour.Will be booking him from now on"
> Source: Sheila - Apr 19, 2026 (5.0, via MyJobQuote)

> "James was really prompt in his response. NOT A SALSESMAN! He outlined the different options available and any possible pit-falls. He explained everything as he went through his diagnostics (and explained it in terms that a person who ISN'T a professional Plumber/Heating engineer would understand!) As this job was for an older adult, James re-arranged his appointments to accommodate the necessary speed that the job required. James has 25+ years’ experience working on both commercial and domestic properties - gaining him the name (in my opinion) as the Boiler Whisperer! All-in-all, a really kind, friendly and professional person who doesn't intrude (and takes his boots off, even if they're clean!) I can’t recommend James highly enough for a quality service and a caring nature."
> Source: Carly - Jan 13, 2026 (5.0, via MyJobQuote)

> "James did a fantastic job servicing my boiler and fixing a slow leak that previously required me to top up the pressure once every 3 days."
> Source: James - Jan 9, 2026 (5.0, via MyJobQuote)

## Trades
Plumber, Bathroom Fitter, Handyman

## What we checked, and when
_What MyTrustedTraders independently checked for this business (verified items only):_
- Review volume: MyTrustedTraders shows 3 public reviews on this profile. (via MyTrustedTraders public listing)
- Public listing spread: MyTrustedTraders shows 1 public listing for this trader. (via MyTrustedTraders public listing)
- Business identity: MyTrustedTraders shows public business identity data with operating status unknown. (via MyTrustedTraders public listing)

Full verification checklist: https://mytrustedtraders.com/traders/jaj-plumbing-and-heating/checks

## Credentials & sources
- Credentials shown: 0
- Companies House status: Unknown
- Evidence held from: MyJobQuote
- Public evidence last checked May 2026

## Before you hire a plumber
_What to check when choosing this kind of trade (general guidance, not a claim about this business):_
- Agree the call-out fee, the hourly or fixed rate, and whether parts are charged on top, in writing, before an emergency plumber starts. Out-of-hours overcharging and 'while I'm here' add-ons are common complaints.
- Be wary of a plumber who, on a first visit, says your whole system or boiler must be replaced. Get a second opinion and an itemised quote (parts and labour separately) before agreeing to major work.
- Gas and boiler work is a separate, regulated trade, not general plumbing. Make sure anyone working on a gas appliance is specifically registered to do gas work, and ask to see that registration before they start.
- For the water-regulations side of plumbing, a WaterSafe-approved plumber is vetted, qualified to the water regulations and insured. You can check yours or find one free at watersafe.org.uk.
- Ask to see a portfolio of completed work like yours, plus recent references you can contact.

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Source: MyTrustedTraders, https://mytrustedtraders.com/traders/jaj-plumbing-and-heating
Real public evidence only: every figure traces to its named source. The evidence for this business comes from a single public source, so it is not yet cross-checked against a second. If a source does not carry a field, it is not shown.