Heating Supplies
6 categories · 29 product ranges
Boilers, flues, radiators, radiator valves, controls and thermostats, cylinders, underfloor heating, pumps, expansion vessels and system chemicals — the parts an installer needs to quote, fit and commission a full heating system. Products from leading manufacturers including Worcester Bosch, Vaillant, Ideal, Baxi and Stelrad, priced for the trade and delivered anywhere in UK mainland.
Shop heating supplies by category
Boilers
- Combi Boilers
- System Boilers
- Regular Boilers
- Oil Boilers
- + 1 more
Radiators
- Panel Radiators
- Designer Radiators
- Towel Rails
- Column Radiators
- + 1 more
Heating Controls
- Room Thermostats
- Programmers
- Smart Thermostats
- TRVs
- + 1 more
Underfloor Heating
- Manifolds
- UFH Pipe
- UFH Mats
- UFH Controls
- + 1 more
Flues & Chimneys
- Boiler Flues
- Flue Extensions
- Vertical Flues
- Plume Kits
Heating Accessories
- Pumps
- Expansion Vessels
- Inhibitors & Cleaners
- Magnetic Filters
- + 1 more
Featured in heating supplies
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Buying heating supplies from Plumb Supply
Boilers: combi, system or regular
A combi suits most one-bathroom properties: no cylinder, no cold tank, hot water on demand. Where two bathrooms are used at once, or the incoming main is weak, a system boiler with an unvented cylinder gives far better simultaneous performance. Regular (heat-only) boilers remain the straight swap on older vented systems where the customer wants to keep the tanks in the loft. Off the gas grid, oil and LPG models cover the same three configurations. Size on heat loss rather than on the boiler that came out — oversizing costs efficiency and shortens cycling life.
Radiators and valves
Type 11, 21 and 22 panel radiators cover most output requirements; column and designer models are chosen where the radiator is part of the room. Towel rails should be sized honestly — a bathroom rarely heats on a rail alone. Pair every radiator except the one in the thermostat's room with a TRV, and use lockshields to balance flow so the last radiator on the circuit heats as well as the first. Electric radiators and electric towel rails suit extensions and conversions where extending the wet circuit is not practical.
Controls, cylinders and commissioning
Building regulations expect proper time and temperature control, so programmers, room thermostats, smart thermostats and zone valves are part of the job, not an upsell. Unvented cylinders need the right expansion vessel and discharge arrangement, and installation is restricted to qualified operatives. Before handover, flush the system, fit a magnetic filter and dose it with inhibitor — the cheapest insurance against pump and heat exchanger failures. Flue runs, plume kits and extensions should be specified from the manufacturer's own range so the warranty stands.
Heating Supplies — frequently asked questions
What heating products does Plumb Supply sell?
Gas, oil and LPG boilers, flues and accessories, radiators and towel rails, radiator valves, heating controls and thermostats, hot water cylinders, underfloor heating, pumps, expansion vessels and system chemicals.
Can I order heating supplies online?
Yes — the full heating range is available to order online with nationwide UK mainland delivery.
Do you supply heating products to trade customers?
Yes. Trade accounts see trade pricing on every product page and can request project quotations for full installations.
What types of radiators are available?
Type 11, 21 and 22 panel radiators, designer radiators, column radiators, towel rails and electric radiators.
What types of boilers are available?
Combi, system and regular boilers in natural gas, plus oil and LPG models for properties off the gas grid.
What size radiator do I need for my room?
Size by heat requirement, not by room size alone. Calculate the room's heat loss (or use a BTU estimate for a straightforward replacement), then pick a radiator whose output at your system's flow temperature meets that figure.
Read the full guide: Radiators Buying Guide: How to Choose Radiators for Any RoomIs a combi or a system boiler better?
It depends on hot water demand and mains pressure. Combis suit smaller homes with one bathroom and good mains flow; system boilers with a cylinder suit homes where more than one outlet may be used at once.
Read the full guide: Boilers Buying Guide: Combi, System and Regular ComparedHow do I convert watts to BTU?
Multiply watts by 3.412. A 1,000W radiator is approximately 3,412 BTU/hr. Divide BTU by 3.412 to go the other way.
Read the full guide: How to Size a Radiator: BTU Calculations Made SimpleAre all modern boilers the same efficiency?
On paper they are close, because the test conditions are standardised. In use, flow temperature, correct sizing, system cleanliness and controls make a far bigger difference than the small gaps between labels.
Read the full guide: Boiler Efficiency Explained: ErP Ratings and Running CostsHeating Supplies advice
All advice & guides →Everything you need to compare radiator types, outputs and sizes before you buy — written for installers and homeowners.
How to choose between combi, system and regular boilers — output, hot water demand, fuel type and the parts every swap needs.
A step-by-step method for working out the BTU output a room needs, and how to turn that figure into a radiator height and width.