John Guest supplier in Romania
Push-in fittings for compressed air and fluids
Headquarters: West Drayton, United Kingdom
Who is John Guest and what does it make?
John Guest makes push-in fittings for compressed air and fluids, based in West Drayton, near London. The core range covers OD tube connectors (5/32 to 1/2 inch) in white or black polypropylene, grey or white acetal, and metric variants, plus a CTS line (3/8 to 1 inch) with the ProLock and Speedfit Twist & Lock locking systems. For the Romanian market we can quote fittings and valves from the current range, suited to pneumatic and fluid installations where fast, tool-free assembly matters.
What sets John Guest apart is the push-in principle: the tube is inserted directly into the fitting, with no thread or crimping, and the SuperSeal variants (code SI) add an extra seal for improved sealing in critical applications. The materials used (polypropylene, acetal and brass, with EPDM or nitrile seals) are chosen according to the fluid carried and the working temperature. The range also includes valves with the same assembly principles, LLDPE tubing, SharkBite-compatible PEX pipe and complete installation kits, plus OEM solutions with acetal or brass half cartridges for integration into your own equipment.
John Guest means fast assembly without special tools on compressed air lines, drinking water or industrial cooling systems, where frequent disconnection and reconnection of fittings would be costly with classic threaded fittings.
What do we supply from the John Guest range?
| Product | Description |
|---|---|
| OD Tube Fittings (5/32 — 1/2 in.) | Push-in connectors for outside-diameter tube, in white polypropylene (code PP), black polypropylene, white metric variant, grey acetal (code PI), white acetal (code CI) and black metric variant (code PM). Application: compressed air lines and light industrial fluids. |
| SuperSeal Fittings (code SI) | Grey acetal variant with an extra sealing gasket, for applications where the risk of leakage must be reduced further compared with the standard fitting, keeping the same tool-free push-in assembly principle. |
| OD Valves (1/4 — 1/2 in.) | Push-in valves, available in polypropylene or acetal, for quickly isolating a branch without taking down the whole tube line. |
| CTS Fittings and Valves (3/8 — 1 in.) | Line for CTS tube with the ProLock and Speedfit Twist & Lock locking systems, also including dedicated valves with the same fixing systems, for diameters larger than the standard OD range. |
| Tubing and OEM Solutions | LLDPE tubing, SharkBite-compatible PEX pipe, complete installation kits and acetal or brass half cartridges for integrating fittings directly into the body of customer-made equipment. |
Why John Guest?
- Tool-free push-in assembly: the tube is inserted directly into the fitting, useful for lines with frequent changes
- Wide choice of materials: polypropylene, acetal and brass, chosen by fluid and temperature
- SuperSeal variant (code SI) with an extra seal for improved sealing
- Compatibility with LLDPE tubing and SharkBite-type PEX pipe, in addition to its own OD tubes
- OEM solutions with half cartridges, for direct integration into equipment made by customers
Which John Guest codes and series are requested most often?
| Code | Description |
|---|---|
| PP | OD connector, white polypropylene, 5/32-1/2 in |
| PP Black | OD connector, black polypropylene |
| Metric PP White | OD connector, metric, white polypropylene |
| PI | OD connector, grey acetal |
| CI | OD connector, white acetal |
| PM | OD connector, metric, black acetal |
| SI (SuperSeal) | Grey acetal connector with extra gasket |
| OD Valves PP | OD valve, polypropylene, 1/4-1/2 in |
| OD Valves Acetal | OD valve, acetal, 1/4-1/2 in |
| ProLock | CTS fitting with ProLock locking, 3/8-1 in |
| Speedfit Twist & Lock | CTS fitting with twist locking |
| ProLock Valves | CTS valve with ProLock locking |
| Speedfit CTS Valves | CTS Speedfit valve, 1/2-3/4 in |
| LLDPE Tubing | LLDPE tubing compatible with OD fittings |
| SharkBite PEX Pipe | PEX pipe compatible with the push-in system |
| OEM Half Cartridge Acetal | Acetal half cartridge for OEM integration |
| OEM Half Cartridge Brass | Brass half cartridge for OEM integration |
Where is John Guest equipment used?
- Plumbing and heating installations, including underfloor heating
- Agriculture: fluid and irrigation lines
- Automotive and industrial cooling
- Marine and caravans/mobile homes
- Water filtration and the beverage industry
- OEM: integration of fittings into customers' own equipment
How do we supply John Guest in Romania?
We state clearly what we confirm for the John Guest range: information on materials and fitting ranges comes from the manufacturer's technical documentation, without our own field verification. We source fittings and valves to order, through EU supply channels, usually in 1–4 weeks depending on confirmation of availability. For a quotation we need the tube type (OD or CTS), the diameter in inches or mm, the material required (polypropylene, acetal) and the fluid carried. A shorter lead time is communicated after checking with the supplier.
Custom OEM half-cartridge configurations and potable-water approvals for each market start from a detailed technical enquiry, sent in advance.
Frequently asked questions about John Guest
What does John Guest make?
John Guest makes push-in fittings and valves for compressed air and fluids, in polypropylene, acetal or brass, based in West Drayton, United Kingdom.
How do I choose the right John Guest fitting by code?
You need to know whether the tube is OD or CTS, the diameter (for example 5/32 or 3/8 inch) and the material required. The codes PP, PI, CI or PM indicate the exact combination of material and colour.
What is the difference between the standard fitting and SuperSeal at John Guest?
The SuperSeal variant, code SI, adds an extra sealing gasket compared with the standard acetal fitting, and is recommended for applications where the risk of leakage must be reduced further.
Do you supply John Guest fittings in Romania?
Yes, to order, through EU supply channels, usually in 1–4 weeks, depending on the manufacturer's confirmation for the code and diameter requested.
What information do you need for a quotation for John Guest fittings?
The tube type (OD or CTS), the exact diameter in inches or mm, the preferred material (polypropylene or acetal) and the fluid carried, so that we can recommend the correct fitting or valve from the available range.
How do I request a John Guest quotation?
Send the John Guest code from the nameplate and the quantity; we reply in English with availability and the lead time written in the quotation.
Request a quoteUpdated: 12 November 2026 · Sources: John Guest / Reliance Worldwide Corporation (manufacturer documentation)