The ZSM rising main system utilises precision machined, self aligning grooves in the pipe and coupling. These permit a high strength, flexible ‘spline’ to be inserted, resulting in a fully circumferential, restrained joint that locks the pipe and coupling together.
- Available in DWI approved 304L or 316 grade stainless steel
- Stainless steel construction gives extra durability and longevity
- Thinner wall thickness than mild steel alternative
- Available from 50mm to 250mm, in 1-metre lengths up to 6 metres
- Lighter than mild steel alternative
- Smaller joints than on flanged pipe
- Locking splines have a safe working load of 6 tonnes
- The system has been tested to 18 tonnes, allowing a safety factor of x 3
- Installation and removal is quick and simple
- No special tools are required
- Generous degree of flexibility for use in misaligned boreholes
G Stow have extensive experience installing ZSM rising mains, making every job quick and efficent. Gaskets are replaced by two ‘O’ rings per joint, the pressure rating for these
rings is 16 bar. They have however been tested to 35 bar. No special cable straps are required, as
conventional saddles and stainless steel banding straps are used. Conventionally designed clamps are used during the installation and subs to match different pump outlets with headworks easily manufactured.
Below you can see the simple way with which the sections are fitted together. After the two sections are jointed together and the locking pin is correctly located the locking springs can be inserted into the centre grooves.
The completed joint can be seen below: