Brass Compression Reducing Set One Piece Pipe Reducer
A practical and reliable brass fitting designed to reduce standard compression fittings for use with smaller pipe sizes. Manufactured from high-quality brass, this compression reducer provides a simple solution when adapting compression fittings, radiator valves and other plumbing connections.
Brass Compression Reducing Set One Piece Pipe Reducer
A practical and reliable brass fitting designed to reduce standard compression fittings for use with smaller pipe sizes. Manufactured from high-quality brass, this compression reducer provides a simple solution when adapting compression fittings, radiator valves and other plumbing connections.
Quick Trade Summary: Brass Compression Reducing Set
MEP Stock supplies precision CW617N brass compression reducing sets designed to step down standard compression fitting sockets (such as converting a 22mm coupling, tee, or valve port to accept 15mm copper pipe). Manufactured to BS EN 1254-2, ensuring reliable metal-to-metal compression seals.
Convert Compression Sockets Without Replacing Entire Valve Bodies
Replacing an entire pump isolation valve, large manifold tee, or installed fitting body simply to drop pipe size is costly and invasive. Our precision brass compression reducing sets fit inside the existing larger fitting socket, adapting it instantly to receive smaller diameter copper or plastic tube.
Engineering Specifications
| Material | Precision Machined CW617N / CW614N Brass (BS EN 1254-2) |
| Standard Sizes | 22mm x 15mm, 28mm x 22mm, 28mm x 15mm |
| Fitting Standard | BS EN 1254-2 Compression Fitting Sockets |
| Pipe Compatibility | BS EN 1057 Copper Tube (Table X R250 Half-Hard / R290 Hard) |
| Pressure Rating | 16 bar at 30°C / 10 bar at 65°C / 6 bar at 110°C |
| Operating Temperature | -10°C to +110°C |
BS EN Installation Protocol
- Step 1: Remove Existing Nut & Olive — Unthread the larger compression nut (e.g. 22mm) and discard standard olive.
- Step 2: Insert Reducer Body — Seat the brass reducing sleeve into the fitting socket shoulder.
- Step 3: Prepare Smaller Tube — Cut smaller tube (e.g. 15mm) square, deburr thoroughly, and slide reducing nut and olive onto pipe.
- Step 4: Insert Tube Home — Push smaller tube fully into the reducing set until seated against internal stop.
- Step 5: Tighten Compression Nut — Tighten nut hand-tight, then tighten 3/4 to 1 full turn with spanner.
Frequently Asked Questions
What is the difference between a 1-piece and 3-piece reducing set?
A 1-piece reducer is a split/solid brass bush; a 3-piece set includes adapter, olive, and nut.
A 1-piece reducer is a split or stepped brass sleeve that drops into the socket under the existing nut; a 3-piece set includes a dedicated stepped adapter ring, smaller brass olive, and matching reducing nut.
Can I use a reducing set inside any standard compression fitting?
Yes, compatible with all BS EN 1254-2 compliant compression fittings, tees, and valves.
Yes, compatible with all BS EN 1254-2 compliant compression fittings, tees, elbows, and ball valves.
Can I use reducing sets on central heating circuits?
Yes, fully rated for pressurized closed-loop central heating and domestic hot/cold water.
Yes, fully rated for pressurized closed-loop central heating and domestic hot and cold potable services.
Do I need jointing paste when installing reducing sets?
Generally no, though a smear of WRAS approved non-setting paste can assist lubrication.
Generally no, though a smear of WRAS approved non-setting paste on the outer brass taper helps lubricate the components under spanner torque.
Can this reducing set be used on plastic pipe (PEX or Polybutylene)?
Yes, provided the plastic pipe has the correct manufacturer pipe insert fitted.
Yes, provided the plastic pipe has the correct manufacturer pipe insert fitted to support the inner tube wall.
What sizes are available in reducing sets?
Available in 22mm x 15mm, 28mm x 22mm, and 28mm x 15mm step-down sizes.
Available in 22mm x 15mm, 28mm x 22mm, and 28mm x 15mm step-down sizes in single packs and multipacks.
Order Trade Brass Compression Reducing Sets Online
Single pieces and contractor trade packs available with wholesale pricing.
Browse Full Compression Range →Quick Trade Summary: Brass Compression Reducing Set
MEP Stock supplies precision CW617N brass compression reducing sets designed to step down standard compression fitting sockets (such as converting a 22mm coupling, tee, or valve port to accept 15mm copper pipe). Manufactured to BS EN 1254-2, ensuring reliable metal-to-metal compression seals.
Convert Compression Sockets Without Replacing Entire Valve Bodies
Replacing an entire pump isolation valve, large manifold tee, or installed fitting body simply to drop pipe size is costly and invasive. Our precision brass compression reducing sets fit inside the existing larger fitting socket, adapting it instantly to receive smaller diameter copper or plastic tube.
Engineering Specifications
| Material | Precision Machined CW617N / CW614N Brass (BS EN 1254-2) |
| Standard Sizes | 22mm x 15mm, 28mm x 22mm, 28mm x 15mm |
| Fitting Standard | BS EN 1254-2 Compression Fitting Sockets |
| Pipe Compatibility | BS EN 1057 Copper Tube (Table X R250 Half-Hard / R290 Hard) |
| Pressure Rating | 16 bar at 30°C / 10 bar at 65°C / 6 bar at 110°C |
| Operating Temperature | -10°C to +110°C |
BS EN Installation Protocol
- Step 1: Remove Existing Nut & Olive — Unthread the larger compression nut (e.g. 22mm) and discard standard olive.
- Step 2: Insert Reducer Body — Seat the brass reducing sleeve into the fitting socket shoulder.
- Step 3: Prepare Smaller Tube — Cut smaller tube (e.g. 15mm) square, deburr thoroughly, and slide reducing nut and olive onto pipe.
- Step 4: Insert Tube Home — Push smaller tube fully into the reducing set until seated against internal stop.
- Step 5: Tighten Compression Nut — Tighten nut hand-tight, then tighten 3/4 to 1 full turn with spanner.
Frequently Asked Questions
What is the difference between a 1-piece and 3-piece reducing set?
A 1-piece reducer is a split/solid brass bush; a 3-piece set includes adapter, olive, and nut.
A 1-piece reducer is a split or stepped brass sleeve that drops into the socket under the existing nut; a 3-piece set includes a dedicated stepped adapter ring, smaller brass olive, and matching reducing nut.
Can I use a reducing set inside any standard compression fitting?
Yes, compatible with all BS EN 1254-2 compliant compression fittings, tees, and valves.
Yes, compatible with all BS EN 1254-2 compliant compression fittings, tees, elbows, and ball valves.
Can I use reducing sets on central heating circuits?
Yes, fully rated for pressurized closed-loop central heating and domestic hot/cold water.
Yes, fully rated for pressurized closed-loop central heating and domestic hot and cold potable services.
Do I need jointing paste when installing reducing sets?
Generally no, though a smear of WRAS approved non-setting paste can assist lubrication.
Generally no, though a smear of WRAS approved non-setting paste on the outer brass taper helps lubricate the components under spanner torque.
Can this reducing set be used on plastic pipe (PEX or Polybutylene)?
Yes, provided the plastic pipe has the correct manufacturer pipe insert fitted.
Yes, provided the plastic pipe has the correct manufacturer pipe insert fitted to support the inner tube wall.
What sizes are available in reducing sets?
Available in 22mm x 15mm, 28mm x 22mm, and 28mm x 15mm step-down sizes.
Available in 22mm x 15mm, 28mm x 22mm, and 28mm x 15mm step-down sizes in single packs and multipacks.
Order Trade Brass Compression Reducing Sets Online
Single pieces and contractor trade packs available with wholesale pricing.
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