A compression fitting forms a mechanical pipe joint using a body, nut and olive. Choose the complete fitting and components for the actual pipe, service and installation. A visible nut does not let you see the internal seal, and a fitting that looks similar is not automatically interchangeable.
Start with an exact part
- Embrass Peerless Compact 8mm compression coupler — a straight compression-fitting example. Confirm the actual tube specification, service and supplied contents. It is not an end-feed capillary fitting.
- Embrass Peerless Compact 15mm equal compression tee — a different size and three-way shape. Confirm the exact supplied finish, olives and required application before ordering.
- Embrass Peerless 15mm copper olive listing — a sealing component, not a complete joint. The legacy URL suggests a 100-pack while current copy says individual supply; ask APM to confirm the actual sale quantity.
- Embrass Peerless 22mm copper olive listing — confirm the size, profile, fitting compatibility and quantity. A photograph shared with or resembling another size is not measurement evidence.
All four records were published with positive stock when checked. System stock is not a physical or allocatable-stock certificate, and quantities must not be treated as individual pieces where the pack is unresolved. Check the product page and checkout for current pricing and available delivery or Acton collection options.
For a confirmed materials list, call or WhatsApp 020 8702 8080 or 07737 263641. Send a plumber’s specification, accessible pipe markings and safe photos. Do not open or disturb a pressurised, leaking or unidentified service to obtain a picture.
Match all connection details
Check every end: pipe size and material, equal or reducing arrangement, and whether the connection is compression, capillary, male/female thread or a tap connector with its specified seal. A nominal half-inch pipe description is not the same thing as a half-inch BSP thread. A compression nut’s thread is not automatically a compatible outlet for another fitting.
Olive material, profile, nut and body must be suitable together. There is no universal copper-versus-brass choice based only on domestic use, vibration or gas. For plastic pipe, use the exact pipe manufacturer’s required support and fitting combination; do not assume all inserts or mixed-brand components are equivalent.
Plan access and the work
Compression can provide a flame-free joint where the specified fitting and pipe suit the application. It is not permission to work on a live system or a generic solution for permanently hidden joints. Water Regs UK’s concealed-wall guidance calls for minimal joints and access for inspection and replacement.
A competent plumber should establish isolation, pipe condition, support, access and the exact manufacturer’s assembly and test requirements. There is no universal spanner-turn count, automatic leak cure, blanket prohibition or permission for jointing compounds, or rule that every old component can be reused. Follow the specific manufacturer’s remake instructions.
Push-fit, end-feed and solder-ring systems have different requirements. Neither visible hardware nor the word “permanent” proves a sound joint. Do not rank one method as always strongest, safest or cheapest without the actual specification and site conditions.
DZR and backflow protection need a specification
DZR means dezincification-resistant. Material suitability depends on the service, water and fitting requirements; “London is hard-water” is not a complete specification or proof that every mains fitting must be a particular DZR product. Confirm the actual material, marking and current requirements for the application.
A double-check valve is not universal backflow protection for every hose, appliance or filling connection. The required arrangement depends on the contamination risk, type of backflow and local water undertaker’s requirements. Water Regs UK explains fluid-category selection and device limits. Get that assessment before buying a protective device.
Lead pipe: get water-company advice
Do not use a standard olive as a generic lead-pipe connector or follow a wiped-joint recipe from this page. The Drinking Water Inspectorate recommends qualified plumbing help and notifying the water company when arranging lead-pipe replacement. A transition fitting must match the actual pipe and system; its purchase does not resolve lead exposure or certify the work.
Gas work must be handled by an appropriately qualified Gas Safe registered engineer. Product-family descriptions do not provide blanket gas installation permission.
Send a useful buying list
- Pipe material, markings, size and service at every end.
- Exact fitting reference, shape, connection type and required finish.
- Specified olives, nuts, inserts or seals and the actual sale quantity.
- Operating conditions, access and any required approval or backflow assessment.
Browse the compression-fittings collection for other sizes and shapes, or contact APM with the confirmed specification. APM Plumbing & Electrical, 24 Western Avenue, Acton, London W3 7TZ. Confirm availability before travelling.
Further primary guidance
Uponor compression-fitting guidance; Embrass Peerless product guide; the Water Regs UK and DWI guidance above. Dated family information is not proof of the actual supplied model, pack or site approval.
Leave a comment