Monument Box Ring Immersion Heater Spanner

The Monument immersion heater spanner is an octagonal box ring, 86mm A/F (3.3/8in), made for really tight immersion heaters. It is a one piece malleable casting that can be struck, and it gives 22mm clearance around the spanner for insulating jackets.

Key features

• Octagonal box ring, 86mm A/F (3.3/8in)
• For really tight immersion heaters
• One piece malleable casting that can be struck
• 22mm clearance around the spanner for insulating jackets

Specifications

Why use a box ring spanner for an immersion heater?

A box ring grips all eight flats of the heater boss, so it is less likely to slip than an open spanner. Because it can be struck, it helps free a heater that has seized.

How to use

1. Turn off the power and isolate the water.
2. Drain the cylinder below the heater.
3. Fit the box ring over the heater boss.
4. Turn or strike to loosen the heater.

FAQs

What size is the Monument immersion spanner?

86mm A/F (3.3/8in).

Can the spanner be struck with a hammer?

Yes, it is a one piece malleable casting that can be struck.

Will it fit over an insulating jacket?

It gives 22mm clearance around the spanner for insulating jackets.