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G Thread (British BSPP) Female to NPT Male Adapter - Lead Free

Description

Need to connect a British BSPP pipe to an NPT threaded system? This lead-free brass adapter does the job cleanly, without leaks, without extra fittings, and without the headache. Available in sizes from 1/4" to 4" to cover a wide range of plumbing needs.

Why This Adapter Works

G Thread (BSPP) is a parallel, straight thread with a constant diameter — it doesn't taper like NPT. That difference is exactly what makes connecting these two systems tricky without the right adapter. This fitting is precision-machined to handle both thread standards in a single piece, giving you a secure, leak-free seal every time.

Key Features

Connects G Thread (British BSPP) female to NPT male pipe threads
Lead-free brass construction — safe for drinking water systems
Parallel G Thread design — easy to install and remove without damage
Washer included for added convenience
Available in sizes 1/4" through 4"
Maximum pressure rated at 120 PSI
Screw-in installation — no special tools required

Where It's Used

Residential and commercial plumbing
Water filtration systems
Irrigation and landscaping projects
HVAC systems
Industrial and commercial applications
New construction and renovation work

Technical Details

Material: Lead-free brass
Finish: Brass
Thread Type: G Thread (BSPP) Female × NPT Male
Available Sizes: 1/4" to 4"
Maximum Pressure: 120 PSI
Installation: Screw-in
Item Dimensions: 4.47 x 2.87 x 2.44 inches
MPN: CSSL5616 | CSSL56161850 | CSSL5616300 | CSSL5616315 | CSSL5616320 | CSSL56160250 | CSSL56160550 | CSSL56160850 | CSSL5616502 | CSSL56160950 | CSSL56162340 | CSSL56162350 | CSSL56162550 | CSSL56162558 | CSSL56162560 | CSSL56162580

4.58 (215)

G Thread (British BSPP) Female to NPT Male Adapter - Lead Free

Name: G Thread (British BSPP) Female to NPT Male Adapter - Lead Free
Brand: Cascada Showers
Price: 14.95 USD
Availability: InStock
Rating: 4.58 (215 reviews)

Cascada Showers

From $14.95 USD ~~$1,119.96 USD~~ /

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Size : 1/4"x1/4" : 3/8" x 3/8" : 3/8" x 1/2" : 1/2"x1/2" : 1/2"x3/4" : 3/4"x1/2" : 3/4"x3/4" : 1"x1" : 1 1/4" x 1 1/4" : 1 1/2" x 1 1/2" : 2" x 2" : 2 1/2" x 2 1/2" : 3" x 3" : 4" x 4"

Set : 1 : 2 : 4

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Remind customers of offers like free shipping and lifetime warranties.

Description

Why This Adapter Works

Key Features

Connects G Thread (British BSPP) female to NPT male pipe threads
Lead-free brass construction — safe for drinking water systems
Parallel G Thread design — easy to install and remove without damage
Washer included for added convenience
Available in sizes 1/4" through 4"
Maximum pressure rated at 120 PSI
Screw-in installation — no special tools required

Where It's Used

Residential and commercial plumbing
Water filtration systems
Irrigation and landscaping projects
HVAC systems
Industrial and commercial applications
New construction and renovation work

Technical Details

Material: Lead-free brass
Finish: Brass
Thread Type: G Thread (BSPP) Female × NPT Male
Available Sizes: 1/4" to 4"
Maximum Pressure: 120 PSI
Installation: Screw-in
Item Dimensions: 4.47 x 2.87 x 2.44 inches
MPN: CSSL5616 | CSSL56161850 | CSSL5616300 | CSSL5616315 | CSSL5616320 | CSSL56160250 | CSSL56160550 | CSSL56160850 | CSSL5616502 | CSSL56160950 | CSSL56162340 | CSSL56162350 | CSSL56162550 | CSSL56162558 | CSSL56162560 | CSSL56162580

Solid Fit Every Time

Threads line up perfectly and seal tight without leaks. Brass feels heavy and strong. Made my plumbing job quick and simple.

Great problem solver.

I use this as part of a connection between a 12V pump to a long silicone hose for taking lake water quality samples. It helps solve a problem with the pump manufactured incorrectly. This 1/2" BSPP female by 3/4" NPT male is exactly what I needed.The adapter is well made and fits well with no leaks. There is a small discoloration in the male thread that appears to be surface corrosion. No problem, It seals well.Material: yellow brassSurface: machinedSize markings: (none)1/2" G washer: includedLength over all: 1.14"Length of male end: 0.55"Length of female end: 0.33"Length of hex: ~0.26"ID of female end: 0.75"ID of male end: ~0.75"ID minimum: 0.59"OD of male end NPT: ~1.03 taperedOD of female end (BSPP): 0.97"Hex flat to flat: 1.22"Hex point to point:1.39"Hex wrench: 1-1/4" (32mm)

Hose adapter

Very handy and well made adapter

Works for converting UK metric thread to NPT

I had to convert a European pipe metric thread to standard for a discontinued piece of food processing equipment. This did the trick. Once I made sure it threaded both sides correctly I ordered a second one. Seal in the female side is kind of floppy so keep an eye on it during install. Be sure to use thread tape or putty.

No Leaks, Includes Gasket

Works great. They include a gasket for the G threads (required for proper sealing), and I didn't have any leaks. The fitting does not have any marks to indicate the threads, which is a little disappointing, but once installed, it doesn't matter, and the gasket is the G thread side. I think the price is a little high, but otherwise, this is a good solution to adapt threads.

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G Thread (British BSPP) Female to NPT Male Adapter - Lead Free

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