Alprene Threaded Clamp Saddle – Reinforced Poly Pipe Tapping Saddle with Stainless Steel (Inox) Bolts

Alprene Threaded Clamp Saddle with Stainless Steel Bolts for Poly Pipe

The Alprene threaded clamp saddle is a bolt-on fitting that lets you add a female BSP threaded outlet to an existing polyethylene (poly) pipe without cutting the line. It clamps around the pipe, seals with a gasket, and is held with stainless steel (inox) bolts, giving you a firm take-off point for a tap, valve, sprinkler riser or branch line in irrigation and farm water systems.

Tapping Into a Line Without Cutting It

Adding an outlet with a tee means cutting the pipe, fitting two joiners and hoping the line lines up again. A clamp saddle skips that. You clamp the saddle onto the pipe where you want the outlet, drill through the pipe via the threaded outlet, and screw in your fitting. It is a faster and tidier way to add a stock water point off a main line, branch off to a new garden zone, or put a tap along a run of poly without disturbing the rest of the pipe.

Why Stainless Steel (Inox) Bolts Matter

Saddles often live in wet soil, irrigation pits and around fertiliser and stock troughs, where plain steel bolts rust and lose their grip over time. Inox is the European term for stainless steel, and stainless bolts and nuts hold up far better to moisture and corrosion. That helps the saddle keep its clamping force for longer, so the seal stays tight and the bolts can still be undone if you ever need to move or replace the fitting.

Choosing the Right Size

Clamp saddles are sized by two measurements: the outside diameter of the pipe they clamp onto, and the size of the female BSP threaded outlet. This saddle is offered in 43mm x 3/4", 43mm x 1" and 2" x 1/2" options. Measure the outside of your pipe before ordering, as the saddle needs to match your pipe's outside diameter to seal properly, then choose the outlet size to suit the tap, valve or fitting you plan to screw in.

Key Features and Benefits

• Adds a female BSP threaded outlet to existing poly pipe
• Bolt-on design, no need to cut the line or fit a tee
• Stainless steel (inox) bolts for corrosion resistance
• Gasket seal for a tight connection to the pipe
• Suits irrigation, farm and garden water lines
• Available in 43mm x 3/4", 43mm x 1" and 2" x 1/2" sizes
• From Alprene, part of the GF+ (Georg Fischer) group

Product Details

• Brand: Alprene (GF+)
• Type: Threaded clamp saddle (tapping saddle)
• Outlet: Female BSP thread
• Bolts: Stainless steel (inox)
• Suitable for: Polyethylene (PE / poly) pipe
• Sizes: 43mm x 3/4", 43mm x 1", 2" x 1/2"

How to Install a Clamp Saddle

Turn off the water and drain the line. Clean the pipe where the saddle will sit, removing dirt and grit so the gasket sits on a smooth surface. Check the gasket is seated properly in the saddle, then position both halves around the pipe and fit the bolts. Tighten the nuts evenly and in an alternating pattern so the saddle pulls down square, but do not fully tighten them yet, as Alprene advises against over-tightening before the threaded fitting is installed. Drill through the pipe wall via the outlet using a hole saw or drill bit that fits inside the thread without damaging it, and clear out any shavings. Wrap your male fitting with thread tape, screw it into the outlet, then finish tightening the saddle bolts evenly. Turn the water on slowly and check for leaks.

Frequently Asked Questions

How do you install an Alprene clamp saddle on a poly pipe?
Turn off and drain the line, clean the pipe, seat the gasket and bolt the saddle on, tightening the nuts evenly but not fully. Drill through the pipe via the outlet, clear the shavings, screw in your taped fitting, then finish tightening the bolts evenly and test for leaks.

Why choose inox stainless steel bolts for irrigation clamp saddles?
Saddles often sit in wet soil and pits where ordinary steel bolts rust. Stainless steel (inox) bolts resist corrosion, keep their clamping force longer and can still be undone years later if you need to change the fitting.

How do you prevent leaks when tapping pipe saddles into water lines?
Start with a clean, undamaged section of pipe, make sure the gasket is seated correctly, and tighten the bolts evenly in an alternating pattern. Use thread tape on the fitting, avoid over-tightening, and clear all drilling shavings before turning the water back on.

Which size clamp saddle do I need?
Match the first measurement to the outside diameter of your pipe and the second to the thread size of the fitting you want to screw in. For example, a 43mm x 1" saddle fits a pipe with a 43mm outside diameter and gives a 1" female BSP outlet.

Is a clamp saddle better than cutting in a tee?
For adding an outlet to an existing line, a clamp saddle is usually quicker and neater, as there is no need to cut the pipe or re-align it. A tee is often chosen when you are building a new line or need a full-bore branch.

Where can I buy an Alprene clamp saddle in Australia?
Alprene threaded clamp saddles are available online from BPG Supplies, with delivery across Australia and local pickup from our store in Bonnyrigg in Sydney's south-west.