John Guest Stem Adaptors available in a range of different imperial sizes featuring NPTF (National Pipe Thread Fuel) threads.

Stem adaptors are ideal for adapting a push fit connection to a male thread connection.

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Products

Name Connection 1 Connection 2 Price Availability Qty
John Guest Stem Adaptor | 3/16" Stem x 1/8" NPTF | PI050621S

John Guest Stem Adaptor - 3/16" Stem x 1/8" NPTF

Code: PI050621S

Connection 1 3/16" Stem
Connection 2 1/8" NPTF
3/16" Stem 1/8" NPTF
£0.85 Inc. VAT
Availability: In stock
£0.85 Inc. VAT
John Guest Stem Adaptor | 1/4" Stem x 1/8" NPTF | PI050821S

John Guest Stem Adaptor - 1/4" Stem x 1/8" NPTF

Code: PI050821S

Connection 1 1/4" Stem
Connection 2 1/8" NPTF
1/4" Stem 1/8" NPTF
£0.91 Inc. VAT
Availability: Temporarily Out of Stock, Still Available to Pre-Order
£0.91 Inc. VAT
John Guest Stem Adaptor | 1/4" Stem x 1/4" NPTF | PI050822S

John Guest Stem Adaptor - 1/4" Stem x 1/4" NPTF

Code: PI050822S

Connection 1 1/4" Stem
Connection 2 1/4" NPTF
1/4" Stem 1/4" NPTF
£0.96 Inc. VAT
Availability: Temporarily Out of Stock, Still Available to Pre-Order
£0.96 Inc. VAT
John Guest Stem Adaptor | 1/4" Stem x 3/8" NPTF | PI050823S

John Guest Stem Adaptor - 1/4" Stem x 3/8" NPTF

Code: PI050823S

Connection 1 1/4" Stem
Connection 2 3/8" NPTF
1/4" Stem 3/8" NPTF
£1.19 Inc. VAT
Availability: In stock
£1.19 Inc. VAT
John Guest Stem Adaptor | 5/16" Stem x 1/4" NPTF | PM050822S

John Guest Stem Adaptor - 5/16" Stem x 1/4" NPTF

Code: PM050822S

Connection 1 5/16" Stem
Connection 2 1/4" NPTF
5/16" Stem 1/4" NPTF
£1.06 Inc. VAT
Availability: In stock
£1.06 Inc. VAT
John Guest Stem Adaptor | 5/16" Stem x 3/8" NPTF | PM050823S

John Guest Stem Adaptor - 5/16" Stem x 3/8" NPTF

Code: PM050823S

Connection 1 5/16" Stem
Connection 2 3/8" NPTF
5/16" Stem 3/8" NPTF
£1.37 Inc. VAT
Availability: In stock
£1.37 Inc. VAT
John Guest Stem Adaptor | 3/8" Stem x 1/4" NPTF | PI051222S

John Guest Stem Adaptor - 3/8" Stem x 1/4" NPTF

Code: PI051222S

Connection 1 3/8" Stem
Connection 2 1/4" NPTF
3/8" Stem 1/4" NPTF
£1.58 Inc. VAT
Availability: Temporarily Out of Stock, Still Available to Pre-Order
£1.58 Inc. VAT
John Guest Stem Adaptor | 3/8" Stem x 3/8" NPTF | PI051223S

John Guest Stem Adaptor - 3/8" Stem x 3/8" NPTF

Code: PI051223S

Connection 1 3/8" Stem
Connection 2 3/8" NPTF
3/8" Stem 3/8" NPTF
£1.72 Inc. VAT
Availability: In stock
£1.72 Inc. VAT

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Specifications

Specifications

Brand John Guest
Fitting Type Adaptor
Material Acetal
Working Pressure and Temperature Range See each individual fitting page for more detail
Approvals & Certifications WRAS Approved, NSF Certified: Standard 51, NSF Certified: Standard 61

Product Description

Collection of NPTF stem adaptors from the John Guest PI range, which is manufactured from a grey acetal.

All fittings feature Super Speedfit technology, which offers a variety of benefits over other connection types.

Benefits of Super Speedfit fittings

  • Easy to use with reduced installation time
  • Can be used on a variety of pipe including copper pipe
  • No tools required
  • Fittings are cost effective reusable components for maximum flexibility
  • Lead free and non-toxic
  • Corrosion free with no scale build up