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Tanair Galvanised BSP Pipework Fittings

Reducing Nipples

Galvanised BSP reducing nipples for joining two female threaded connections of different sizes in compressed-air and compatible industrial pipework systems.

Browse Reducing Nipples Need Sizing Help?

Male BSP → Male BSP

Galvanised Malleable Iron

1/2" to 2" Main Sizes

Compressed Air Pipework

Online Pricing

Reduce Between Two Female BSP Connections

A reducing nipple has male threads at both ends but with different BSP sizes. It is used where two female threaded fittings, valves or pipework components need to be joined while reducing the bore from one nominal size to another.

Important: this is different from a reducing bush, which has a male thread on the outside and a female thread inside. Choose the fitting type from the thread gender already present at each side of the joint.

Find the Right Reducing Nipple

Search by size or SKU.

Shop Tanair Reducing Nipples

Tanair 12-14rn | 1/2" - 1/4" BSP Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 12-14rn | 1/2" - 1/4" BSP Galvanized Reducing Nipple

Reduction1/2" → 1/4" SKU12-14rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£4.61 ex VAT £5.53 inc VAT

Tanair 34-38rn | 3/4" - 3/8" Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 34-38rn | 3/4" - 3/8" Galvanized Reducing Nipple

Reduction3/4" → 3/8" SKU34-38rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£4.67 ex VAT £5.60 inc VAT

Tanair 34-12RN | 3/4" - 1/2" Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 34-12RN | 3/4" - 1/2" Reducing Nipple

Reduction3/4" → 1/2" SKU34-12RN ConnectionMale BSP → Male BSP MaterialMalleable Iron

£4.67 ex VAT £5.60 inc VAT

Tanair 1-34-Reducing-Nipple | 1" - 3/4" Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 1-34-Reducing-Nipple | 1" - 3/4" Reducing Nipple

Reduction1" → 3/4" SKU1-34-Reducing-Nipple ConnectionMale BSP → Male BSP MaterialMalleable Iron

£3.33 ex VAT £4.00 inc VAT

Tanair 1-12rednip | 1" - 1/2" Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 1-12rednip | 1" - 1/2" Reducing Nipple

Reduction1" → 1/2" SKU1-12rednip ConnectionMale BSP → Male BSP MaterialMalleable Iron

£4.61 ex VAT £5.53 inc VAT

Tanair 114-34rn | 1 1/4" - 3/4" Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 114-34rn | 1 1/4" - 3/4" Galvanized Reducing Nipple

Reduction1 1/4" → 3/4" SKU114-34rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£8.08 ex VAT £9.70 inc VAT

Tanair 114-1-RN | 1 1/4" - 1" Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 114-1-RN | 1 1/4" - 1" Reducing Nipple

Reduction1 1/4" → 1" SKU114-1-RN ConnectionMale BSP → Male BSP MaterialMalleable Iron

£8.08 ex VAT £9.70 inc VAT

Tanair 112-1rn | 1 1/2" - 1" BSP Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 112-1rn | 1 1/2" - 1" BSP Galvanized Reducing Nipple

Reduction1 1/2" → 1" SKU112-1rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£6.25 ex VAT £7.50 inc VAT

Tanair 112-114rn | 1 1/2" - 1 1/4" BSP Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 112-114rn | 1 1/2" - 1 1/4" BSP Galvanized Reducing Nipple

Reduction1 1/2" → 1 1/4" SKU112-114rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£8.50 ex VAT £10.20 inc VAT

Tanair 2-1rn | 2" - 1" BSP Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 2-1rn | 2" - 1" BSP Galvanized Reducing Nipple

Reduction2" → 1" SKU2-1rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£6.22 ex VAT £7.46 inc VAT

Tanair 2-1-12rn | 2" - 1 1/2" BSP Galvanized Reducing Nipple

Galvanised BSP Reducing Nipple

Tanair 2-1-12rn | 2" - 1 1/2" BSP Galvanized Reducing Nipple

Reduction2" → 1 1/2" SKU2-1-12rn ConnectionMale BSP → Male BSP MaterialMalleable Iron

£6.22 ex VAT £7.46 inc VAT

Product images: each card uses its Tanair product-specific media path. A Tanair-hosted fallback is built in so an older WordPress media filename can never leave a broken or blank image on the page.

Current catalogue: these are the reducing-nipple combinations confirmed across the live Tanair BSP fitting ranges. Prices shown are current catalogue values checked while rebuilding the page.

Reducing Nipple, Bush or Socket?

Reducing NippleMale thread at both ends. Joins two female connections of different sizes.

Reducing BushMale outside and female inside. Screws into a larger female port to create a smaller female connection.

Reducing SocketFemale thread at both ends. Joins two male threaded components of different sizes.

What to Check Before Ordering

Confirm both BSP thread sizes
Confirm both existing connections are female
Check operating pressure and medium

Consider bore reduction and airflow requirements
Use a suitable thread seal for the application
Do not identify BSP size from outside diameter alone

Galvanised BSP Fittings for Compressed Air

The Tanair reducing-nipple range is part of the wider galvanised BSP fitting system used for fixed compressed-air distribution, workshop airlines and industrial pipework. Current product specifications identify malleable iron construction with galvanised hot-dip zinc coating on the traditional reducing-nipple range.

Flow consideration: reducing the pipe bore increases air velocity and can contribute to pressure drop. On higher-demand compressed-air systems, avoid reducing the line more than the downstream equipment actually requires.

Reducing Nipple FAQs

What is a reducing nipple?

A reducing nipple is a threaded adaptor with different-size male BSP threads at each end. It joins two female threaded connections while changing nominal pipe size.

How is a reducing nipple different from a reducing bush?

A reducing nipple is male-to-male. A reducing bush is male-to-female.

Which size is listed first?

The larger nominal BSP size is normally listed first, followed by the smaller BSP size.

Can these be used in compressed-air systems?

Yes, where the fitting specification, system pressure and installation are suitable for the application.

Are the prices shown ex VAT and inc VAT?

Yes. Both values are shown on each product card.

Not Sure Which Reducing Nipple You Need?

Tell us the two female BSP connection sizes you need to join, or send a clear photo and measurements of the existing fittings.

Call 0121 753 3330

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