Tesla Immersion Heater Fibre Sealing Washer 2.1/4 inch BSP Replacement Seal

Description

The Tesla Immersion Heater Fibre Washer is a genuine 2-1/4" BSP replacement sealing washer for use when fitting or replacing a standard domestic immersion heater. It creates a watertight seal between the heater boss and the cylinder thread, and should always be renewed whenever an immersion heater is removed and refitted.

Manufactured from fibre, this washer is the correct replacement for the standard 2-1/4" BSP boss used across the majority of the Tesla domestic immersion heater range, including the Copper, Incoloy and Titanium element variants.

Fibre

Material

2-1/4"

Boss Size

Green

Colour

BSP

Thread Standard

Please Note: Always fit a new sealing washer when removing and refitting an immersion heater. Reusing an old, compressed washer is a common cause of leaks at the cylinder boss. Older washers may also contain traces of asbestos — handle and dispose of removed washers with appropriate care.

Fibre Construction for a Reliable Seal

Manufactured from fibre, this washer compresses evenly under the heater boss to form a watertight seal against the cylinder thread.

Matches the Standard 2-1/4" Boss

Sized specifically for the 2-1/4" BSP boss used across the majority of the Tesla domestic immersion heater range.

Simple Like-for-Like Replacement

A straightforward, low-cost part to keep on hand whenever an immersion heater is being removed, inspected or replaced, avoiding an unnecessary return trip for a single seal.

General Specification
Product Type	Fibre sealing washer
Boss Size	2-1/4" BSP
Material	Fibre
Colour	Green
Compatible Use	Standard 2-1/4" BSP immersion heater boss on domestic hot water cylinders

Important Safety Information: This washer forms part of the sealing arrangement for a mains-voltage electrical heating appliance. Fitting or replacing an immersion heater and its sealing washer should be carried out by, or under the supervision of, a suitably qualified person, with the electrical supply isolated before any work begins.

Do I need to replace the washer every time I remove the immersion heater?

Yes. A fibre washer compresses permanently once fitted and will not reseal reliably if reused. Always fit a new washer whenever the heater is removed and refitted.

What boss size does this washer fit?

This washer is sized for the standard 2-1/4" BSP boss used on the majority of domestic immersion heaters, including the Tesla Copper, Incoloy and Titanium ranges.

Is this washer suitable for the 1-3/4" or 1-1/2" boss heaters?

No. This washer is specifically sized for the 2-1/4" BSP boss. Heaters using the smaller 1-3/4" or 1-1/2" boss require a differently sized seal.

What should I do with the old washer when I remove it?

Handle old washers with care, as some older washers may contain traces of asbestos. Follow current regulations for safe handling and disposal.

BTU Calculator

BTU & WATT Calculator

Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

Calculate

Required Heating

0

Watts

0

BTUs