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Basic Jointing/Pipe Cutting

When cutting Hep 2 O pipe it is essential to use the correct tools.

Only the recommended cutters should be used. Do not use a hacksaw. (Figure No. 1)

Before making a joint ensure the pipe end is clean, cut square and free from burrs and surface damage. (Figure No. 2). Place the pipe in the jaws of the cutter and apply pressure, the pipe should be rotated whilst maintaining the pressure until the pipe is severed. (Figure No. 3)

To ensure adequate insertion, essential for a secure joint cut the pipe square at one of the cutting/insertion marks '/\'. The distance between these marks indicates full socket depth (Figure No. 3).

When it may not be possible to use the ‘/\’ marks eg. badly lit areas, jointing copper pipe or where an exact length is required, mark the insertion depth on the pipe using a pencil or suitable marker pen. The correct insertion depth can be obtained by holding the pipe against the fitting or by measuring with a rule, as shown in figure 4. The depth of insertion is shown in Table 3 at the end of this section.

Support Sleeve: ALWAYS insert a Hep 2 O support sleeve into the pipe end. (Figure No. 5) It is essential to use a support sleeve in order to make a good joint. Failure to use a support sleeve will negate the guarantee (the only exceptions to this rule are when using copper pipe, or the spigot end of a Hep 2 O fitting).

Pipe Insertion: When using Demountable Hep 2 O BiTite fittings, DO NOT slacken the retaining cap prior to pipe insertion. This will not ease jointing. Push the pipe and fitting firmly together (Figure No. 6). Do not knock the fittings onto the pipe (Figure No. 7). A secure professional joint has been achieved when the socket of the fitting has reached the next '/\'mark (or pencil mark) on the pipe.

TIP - when inserting pipes into fittings it is a good idea to look at the fittings to make sure a washer didn't accidentally drop out or get turned around.

As a final precaution, after jointing it is recommended that, whilst holding the fitting firmly, the pipe is tugged back to check that the joint is secure.

Dismantling a Joint (Demountable fittings only) Figure No. 9 Unscrew the retaining cap and remove the pipe clear of the fitting.

The grab wedge and ‘O’ ring will be in position on the pipe. Remove the ‘O’ ring from the end of the pipe.

The grab wedge can then be removed using the demounting tool. Provided the grab wedge is undamaged, it can be re-used.


  • Pipe should be rotated in cutters during cutting operation.
  • Support sleeve is an integral part of system and should NEVER be omitted when using Hep2O pipe.
  • Once completed Hep2O BiTite joints can be rotated even under pressure. Rotatability also enables fittings such as stopcocks and draincocks to be rotated close to the wall when not in use.

Re-assembling a Joint To re-assemble the fitting, insert the ‘O’ ring into the fitting body until it rests on the cassellated ledge at the base of the socket. If necessary re-lubricate the ‘O’ ring with Hepworth Silicone Lubricant. Check that the grab wedge is undamaged (replacement grab wedges are available. Insert the grab wedge into the fitting body with the flat face of the grab wedge against the’O’ ring, slots facing outwards. Replace the retaining cap and hand tighten. The fitting is now ready for use.

Figure No. 12
10mm, 15mm and 22mm and 28mm Fittings


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