Last reviewed: June 2026 by the Water Softener Quotes editorial team

Your 8-point checklist

Tick these off before you commit to any quote.

  • Unit matched to your household size and water hardness
  • Salt type confirmed (block, tablet, or granular)
  • Physical dimensions checked against your install space
  • Installation cost included in the quote (not a surprise extra)
  • Bypass valve included for maintenance isolation
  • Warranty length and what it covers confirmed in writing
  • Annual service plan offered and priced
  • Written quote with no hidden charges or vague estimates

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The deeper buyer's checklist — six things people miss

The basics (price, brand, warranty) are covered above. These are the items most buyers forget — and the ones that cause regret a year in.

1. Get an itemised written quote

Not a single £ figure on a card. The quote should break down the unit, the fitting kit, the labour, and any optional service plan separately. This is the only way to compare two quotes fairly — and the only protection if the installer tries to add extras on the day.

2. Check what voids the warranty

Every brand has rules. Kinetico requires Authorised Dealer installation. Harvey requires the right salt format. Read the warranty conditions before you sign — not after a fault. Keep the commissioning certificate alongside your boiler paperwork.

3. Confirm where it will fit

Walk through the install location with the installer, not just on the phone. Measure for door clearance for delivery. Check there is a drain within reach. Decide whether you can carry salt to the spot — this matters for the next 15 years, not just on day one.

4. Ask about the salt

Block or tablet? How many kg per month for your household size? Where do you buy it — from the installer, a wholesaler, or online? Salt costs over 15 years can match or exceed the unit price. Build it into your total-cost thinking.

5. Sanity-check the call-out policy

Most warranties cover parts but not labour. Ask: what is the call-out fee? Is the first year free? What if the unit needs a part under warranty — do I still pay the engineer's time? Surprise call-out bills are the number-one source of post-purchase complaints.

6. Red flags during the sales visit

Aggressive same-day-only discounts. Vague answers on warranty conditions. No mention of a written quote. Reluctance to leave you with paperwork to read before deciding. A good installer welcomes a second quote — a bad one pressures you against it.

One final tip: ask for the installer's most recent customer references — not the testimonials on their website, but two or three real customers from the last six months you can phone. A confident installer will hand them over. A reluctant one tells you everything you need to know.

See also: vetted UK installers · warranty guide · all UK softener prices

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Buyer checklist questions

What people ask before committing.

Should I get more than one quote?

Always try to compare where possible. The number of quotes you receive depends on installer coverage in your postcode area. Even one detailed quote gives you a baseline to evaluate.

What should I ask the installer during the visit?

Ask about warranty terms, what salt they recommend, whether annual servicing is included or extra, and how long the install will take. A good installer will explain everything without being asked.

Can I negotiate on price?

Some installers have flexibility, especially if you are comparing against a written quote from a competitor. The install fee is more negotiable than the unit price, which is set by the manufacturer.

What is a red flag I should walk away from?

Same-day-only discounts that expire if you do not sign on the doorstep. Vague answers about what voids the warranty. Reluctance to provide a written itemised quote. A good installer welcomes you getting a second opinion — a bad one pressures you against it.

Should I ask for customer references?

Yes — ideally two or three real customers from the last six months you can actually phone, not just testimonials on a website. A confident installer will hand them over. Reluctance is a useful signal.

Is the call-out fee usually free under warranty?

Often not. Most warranties cover parts but not labour, so you typically pay a £60–£90 call-out fee even when the underlying fault is covered. Confirm this in writing before you buy — it is the most common source of post-purchase surprise.

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