John Guest Drinks Grey Acetal Rigid Elbow NPTF
Technical Specification
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Materials:
- Body: Acetal Copolymer (Unfilled)
- O-Ring: Nitrile Rubber (Black)
- Collet: Acetal Copolymer (Unfilled)
- Collet Teeth: 301 Stainless Steel
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Working Pressure: 16 bar (7 bar at 65°C)
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Working Temperature: 1°C to 65°C
- Thread Type: Male US NPTF (National Pipe Taper Fuel)
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Tube Compatibility: LLDPE, polyethylene, nylon, polyurethane and soft metal tubes.
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Food-grade Material: Suitable for use with foodstuffs and potable liquids.
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Features: Instant push-fit leak-tight connection that is fully demountable.
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Manufacturing: Manufactured and assembled in the UK by John Guest.
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Approvals: WRAS approved and BSI Kitemark certified.


Description
This NPTF threaded elbow provides a 90° transition between imperial tube and a male NPTF threaded port. It is commonly used where beer, beverage or gas lines need to connect directly into US threaded equipment such as coolers, regulators, pumps or dispense components. This configuration is ideal for pub cellars and bar installations that incorporate imported equipment requiring NPTF connections. The rigid elbow design forms a fixed right angle, helping maintain tidy pipe routing while reducing strain on tubing and threaded ports.
Manufactured from grey acetal copolymer, the fitting is suitable for potable liquids, foodstuffs and inert gases. In line with the British Beer and Pub Association Code of Practice, it can be used on N2, CO2 and mixed gas dispense lines, as well as vacuum applications. Its material construction supports reliable performance in chilled cellar conditions and high-demand bar environments.
The push-fit end creates an instant leak tight seal without tools, hot works or sealing agents on the tube side. The precision collet locking system secures the tube firmly without deformation or internal restriction, helping maintain steady pressure and consistent pour quality. Fully demountable on the push-fit side, it allows straightforward servicing and system adjustments.
Key Features & Benefits
- NPTF threaded connection: Connects imperial beer or beverage tube to male NPTF equipment ports.
- Rigid 90° configuration: Forms a fixed right angle for structured pipe layouts.
- Push-fit tube end: Fast, tool-free installation with immediate leak tight sealing.
- Designed for drinks dispense: Suitable for beer lines, beverage feeds and gas systems in pubs and bars.
- Secure collet mechanism: Stainless steel teeth retain tubing without restricting flow.
- Fully demountable push-fit side: Simplifies maintenance and equipment replacement.
Dimensions


| Product Code | Manufacturer Code | Size | A (Tube O/D) |
B | C | D | E | F | G | H | I | J |
| 381981 | PI480821S | 1/4" x 1/8" NPTF | 0.250" (6.35mm) |
0.97" (24.7mm) | 0.77" (19.5mm) | 0.62" (15.7mm) | 0.60" (15.2mm) | 0.21" (5.3mm) | 0.41" (10.5mm) | 0.70" (17.7mm) | 1.00" (25.3mm) | 0.37" (9.4mm) |
| 381982 | PI480822S | 1/4" x 1/4" NPTF | 1.04" (26.4mm) | 0.77" (19.5mm) | 0.62" (15.7mm) | 0.60" (15.2mm) | 0.21" (5.3mm) | 0.55" (14.0mm) | 0.86" (21.8mm) | 1.16" (29.4mm) | 0.37" (9.4mm) | |
| 381983 | PI480823S | 1/4" x 3/8" NPTF | 1.10" (28.0mm) | 0.76" (19.4mm) | 0.62" (15.7mm) | 0.59" (15.0mm) | 0.21" (5.3mm) | 0.69" (17.4mm) | 0.88" (22.4mm) | 1.18" (29.9mm) | 0.37" (9.4mm) | |
| 381984 | PI481022S | 5/16" x 1/4" NPTF | 0.313" (7.94mm) |
1.22" (31.0mm) | 0.95" (24.0mm) | 0.66" (16.7mm) | 0.70" (17.8mm) | 0.25" (6.3mm) | 0.55" (14.0mm) | 0.86" (21.8mm) | 1.21" (30.7mm) | 0.38" (9.6mm) |
| 381985 | PI481023S | 5/16" x 3/8" NPTF | 1.29" (32.7mm) | 0.95" (24.0mm) | 0.66" (16.7mm) | 0.70" (17.8mm) | 0.25" (6.3mm) | 0.69" (17.4mm) | 0.88" (22.4mm) | 1.23" (31.3mm) | 0.38" (9.6mm) | |
| 381986 | PI481222S | 3/8" x 1/4" NPTF | 0.375" (9.53mm) |
1.26" (32.0mm) | 0.99" (25.0mm) | 0.78" (19.7mm) | 0.78" (19.8mm) | 0.30" (7.6mm) | 0.55" (14.09mm) | 0.95" (24.2mm) | 1.34" (34.1mm) | 0.49" (12.6mm) |
| 381987 | PI481223S | 3/8" x 3/8" NPTF | 1.35" (34.3mm) | 1.01" (25.6mm) | 0.78" (19.7mm) | 0.78" (19.8mm) | 0.38" (9.6mm) | 0.69" (17.4mm) | 0.98" (25.0mm) | 1.37" (34.9mm) | 0.49" (12.6mm) | |
| 381988 | PI482024S | 5/8" x 1/2" NPTF | 0.625" (15.88mm) |
2.15" (54.7mm) | 1.72" (43.8mm) | 1.20" (30.5mm) | 1.10" (28.0mm) | 0.52" (13.2mm) | 0.85" (21.8mm) | 1.17" (29.6mm) | 1.72" (43.6mm) | 0.75" (19.0mm) |

