Lubricants
Brett Martin strongly recommend the use of lubricants to ease jointing and reduce installation time.

The Plumbfit system should be designed and installed in accordance with BS 5955:Part 8 1990 – Specification for the installation of thermoplastics pipes and associated fittings for use in domestic hot and cold water services and heating systems.

Installation
As the walls will expand and contract under certain pressures,polybutylene offers increased resistance to the effects of freezing. However, it is sensible to insulate the system where the possibility of freezing exists, to ensure the system operates efficiently.Where the pipework is installed underground, externally or in public areas, relevant ducting offering suitable protection and insulation should be used to help prevent accidental or malicious damage.

Protection
Polybutylene pipework should not be connected directly to a boiler or circulator, unless a high limit thermostat and a pump overrun facility is
incorporated. If not, a minimum of 350mm of copper tube must be used to make such a connection or a minimum 1000mm of copper tube for a solid fuel boiler connection.

Boiler Connection
As previously described, pulling sharply on the pipe and fitting will determine a properly made joint. However, pressure tests should always be completed,immediately after the system has been installed,to identify any improperly made joints.During the test procedure each joint should carefully be checked for leakage.The system must be completely full of water and tested to a pressure and temperature recommended by the manufacturer of the boiler, pump etc used, in both hot and cold conditions.Reference should be made to BS 7593:1992 "Code of practice for the treatment of water in domestic hot water central heating systems".

Testing
The Plumbfit range is guaranteed for 25 years against defects in materials and manufacture.This will only apply if the system has been installed, maintained and used correctly as described in the Company's literature and in the relevant British Standard Codes of Practice and extends to the provision of free replacement of the affected items, identified to be
defective by the Company and applies to installations in the UK only. This guarantee does not affect the statutory rights of the customer.Any other claims for damage or loss either direct,or indirect or consequential whatever the cause thereof are excluded from this guarantee.

Guarantee
Should a fitting need to be dismantled, unscrew the retaining cap, pull the pipe from the fitting and separate the space washer and ‘O’ Ring
from the grab ring. Using pliers flatten the teeth of the grab ring and discard. Incorporating a new grab ring, reassemble the fitting as shown in the diagram opposite. Ensure that the grab ring teeth are angled towards the fitting, and lubricate the ‘O’ ring.

Dismantling A Fitting
Ideally, Plumbfit should be stored internally in cool dry conditions and out of direct sunlight.

Storage
The Plumbfit system is designed for hot and cold water services and domestic central heating installations and should not be used in other situations. Plumbfit must not be used to convey gas, oil or compressed air.

Restrictions
Intumescent penetration or oil based thread sealing compounds or solder flux should not be allowed to come into contact with polybutylene pipework.Threaded joints should be made using PTFE on the thread in the normal way.

Sealing Compounds
Intumescent penetration or oil based thread sealing compounds or solder flux should not be allowed to come into contact with polybutylene pipework.Threaded joints should be made using PTFE on the thread in the normal way.