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Surplus Plumbing & Heating

Copper pipe, fittings, surplus radiators, cylinders and UFH from UK trades. Reclaimed cast iron rads for period restorations and end-of-line modern stock for new builds.

Plumbing and heating surplus is fragmented but high-value. A single Victorian cast-iron radiator can sell for £180–£450 restored, and a full UFH manifold left over from a self-build clearance goes for a third of Screwfix retail. Copper is the perennial commodity — offcuts and half-drums appear on SurplusBuilder every week as merchants sell down slow-moving lengths.

For period restorations, reclaimed cast-iron rads are more or less the only game in town — new reproductions cost more than genuine restored originals and don't hold their value. For new builds and rental refurbs, surplus modern steel panel rads at 40–50% of retail keep a first-fix budget under control.

Every listing shows pressure test status (essential for reclaimed rads), material grade, and where relevant the boiler/manifold spec and warranty status.

  • cheap copper pipe offcuts
  • surplus radiators job lot
  • leftover boiler parts
  • reclaimed cast iron radiators
  • surplus underfloor heating
  • reclaimed cast iron bath
  • surplus copper cylinder
  • leftover UFH pipe manifold

2026 UK price bands

Live SurplusBuilder listings sampled Q1 2026. Regional variation ±10–20%.

ProductTypical surplus £Merchant new
Copper pipe 22mm (surplus 3m)£8–£14£18–£26
Steel panel rad 600×1200£45–£85£110–£180
Reclaimed cast-iron rad (restored)£180–£450n/a (bespoke)
Reclaimed cast-iron bath£280–£850n/a
Surplus UFH manifold (8-port)£140–£240£320–£480
Copper cylinder 210L (new surplus)£220–£380£480–£680

Buyer's checklist

  • ✓Cast-iron rads must be pressure-tested to 3 bar before installation — most reputable sellers do this pre-listing.
  • ✓Copper pipe: check for kinks, dents and any greening (corrosion) at cut ends.
  • ✓UFH pipe has a design life of 50 years — surplus stock is fine if never installed and stored dry.
  • ✓Boiler surplus is limited to unfitted units in original packaging with warranty transferable.
  • ✓Reclaimed cast-iron bath weights: single-ended 90–110kg, roll-top 130–180kg. Confirm your joist capacity.
  • ✓For UFH manifolds, count the ports and confirm they match your circuit count before buying.

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Related categories

Surplus Electrical & Lighting

Surplus cable, consumer units, accessories and commercial lighting clearance. End-of-line and overstock from UK wholesalers and electricians.

Frequently asked questions

Are reclaimed cast iron radiators pressure tested?+

Reputable sellers test to 3 bar before listing and note the test pressure in the description. Untested reclaimed rads should be rejected or discounted to scrap price — leaking a cast-iron rad in a domestic setting causes serious damage.

Can I use surplus copper on a new build?+

Yes — copper stock does not degrade in storage. Check for kinks, dents, and any greening at cut ends. Surplus copper is graded and priced identically to new merchant stock.

What about surplus boilers?+

Only buy sealed, new-in-box units with the manufacturer warranty card present. Ex-display or previously-fitted boilers are not worth the resale risk — the £200 saving vanishes in a first-year fault.

Do surplus radiators come with valves?+

Rarely — valves are usually kept by the original buyer or sold separately. Budget £15–£45 per pair for surplus TRV/lockshield sets on the same listing or a separate valve lot.

How do I restore a reclaimed cast-iron rad?+

Steam-strip old paint (or dip-strip at a specialist), pressure-test to 3 bar, prime with red oxide, top-coat with radiator paint or a specialist Farrow & Ball radiator primer/topcoat. Budget £80–£140 per rad for a professional restoration.

Is UFH pipe safe to reuse?+

Only if never installed. Once encapsulated in screed and pressurised, UFH pipe should stay in place — retrieving and reusing pipe from a strip-out risks kinks that fail later. Surplus new UFH pipe is fine when stored dry.