Technical Assistance

Technical Assistance Installation Guide

Installation Guide

CAUTION

Do not apply any impact force to fittings.
fittings are plastic materials and should not be treated the same as metals.
fittings may melt, crack or distort if exposed to open flames or excessive heat.
Do not use pipe sealant, thread sealants or Teflon® paste in order to seal threaded fittings. All the connections to fittings are either a mechanical compression type, or seal with a rubber gasket and do not require any other forms of sealant. Do not insert fingers into fittings as the stainless steel teeth may cause injury.

If PEX pipe is used, then a tube support liner must be used also. The tube support liner acts as an internal support for the end of the pipe.

fittings should not be used for gas, fuel oil or compressed air applications.
DO NOT allow contact with any chemical or foreign substance; paint stripers, solder flux, Acid based descalents or chemical.

fittings are not suitable for buried installation.
All fittings and related products should be selected, installed, used and maintained in accordance with these Technical Specifications.

When cutting pipe, ensure that the ends are cut square and are free of burrs.

Ensure that there are no scratches, gouges or any form of damage on the circumference of the pipe within 1 in. (25.4mm) of the cut end. Damage in this area may cause leakage. Check the fitting for any signs of damage or foreign objects.

Do not use a damaged or scored pipe.

  • Do not leave burrs on the pipe.
  • Ensure that the pipe is pushed into the fitting fully and is engaged properly in accordance with the instructions.

* If the pipe is not fully inserted, the connection cannot be properly sealed even if the fitting is coupled.
* If these installation guidelines conflict or are inconsistent with local building or plumbing codes, any codes applicable to parallel plumbing systems shall prevail.

Do not use a hacksaw to cut a pipe. Do not leave burrs on the pipe.

Ensure that the pipe is pushed into the fitting fully and is engaged properly in accordance with instructions.

If the pipe is not fully inserted, the connection cannot be properly sealed even the fitting is coupled.

You must push in the pipe passing the collets (gripper) and the O-ring inside the fitting.

When a connection has to be disassembled and reused, ensure the pipe has no damage around the circumference within 1" (25.4mm) of the end. Inspect the tube and fitting for any signs of damage and ensure they are free of foreign materials. The connection can then be reassembled.

For plastic pipes:
  • Always use an appropriate pipe cutting tool such as plastic pipe shears to cut plastic pipes. Never use a hacksaw as this could cause damage.
For copper pipes:
  • Use a pipe cutting wheel or pipe slice.
Twistloc push-fit Installation
  • 1

    Cut the pipe squarely using plastic pipe cutting tool. Ensure the outside of the pipe is free from burrs and score marks.
    Push pipe insert into the pipe. Pipe inserts are not required when using Copper pipe.
  • 2

    Measure and mark the insertion depth on the pipe using a suitable marker. Push fitting onto the end of the pipe until it reaches the pipe stop.
  • 3

    Twist the screw cap until coloured ring is no longer visible. Pull the pipe away from the fitting to check it is a secure fit.
    ***Advisory*** Test system to ensure water tight.
    *Optional - Fit coloured collect clip to provide easy recognition between hot (red) and cold (blue) pipes. This will also provide additional locking of the fitting.
  • 4

    To DISCONNECT: Make sure that the system is de-pressurised. Unlock fitting by twisting until coloured ring is visible. Press collect squarely against the face of the fitting. With the collet depressed, pull on the pipe to remove it from the fitting.
    PIPE Size(OD) 10mm 15mm 16mm 20mm 22mm 28mm
    Insertion Depth 22mm 30mm 32mm 36mm 36mm 41mm
    PIPE Size(OD) 1/4" 3/8" 1/2" 5/8" 7/8" 1 1/8"
    Insertion Depth 20mm 22mm 27mm 32mm 37mm 41mm
  • 5

    Push the fitting onto the pipe until you reach the pipe stop and insertion depth marking.
  • 6

    Twist the screw cap until the coloured ring is no longer visible. Only use hand force to twist the screw cap; using a wrench or other tools can easily damage the fitting and would not be covered by our guarantee.
  • 7

    Pull the pipe away from the fitting to check it is a secure fit.
Push Fit Fitting
  • 1

    Cut the pipe squarely using plastic pipe cutting tool. Ensure the outside of the pipe is free from burrs and score marks.
    Push pipe insert into the pipe. Pipe inserts are not required when using Copper pipe.
  • 2

    Measure and mark the insertion depth on the pipe using the table below and a suitable marker. Push fitting onto the end of the pipe until it reaches the pipe stop.
    PIPE Size(OD) 10mm 15mm 22mm
    Insertion Depth 20mm 28mm 34mm
    PIPE Size(OD) 1/4" 3/8" 1/2" 5/8"
    Insertion Depth 17mm 20mm 24mm 29mm
  • 3

    Pull the pipe away from the fitting to check it is a secure fit.
    * Test system to ensure watertight.
    * Optional - Fit coloured collet clip to provide easy recognition between hot (red) and cold (blue) pipes. This will also provide additional locking of the fitting.
  • 4

    To disconnect:
    Make sure that the system is depressurized. Press collet squarely against the face of the fitting. With collet depressed, pull on the pipe to remove it from the fitting.
  • Tensile Strength Test

    The graph above shows the results of a tensile strength test conducted independently by the Korean Government Laboratory and shows conclusive prove that Twistloc fittings outperform our competitors.

  • Maximum Torque Figures

    The Maximum torque values for threads used on products are as follows

    Thread Size Maximum torque
    Plastic 1/2″ 3.5Nm
    3/4″ 4Nm
    1″ 5Nm
    *1Nm=8.85Ibf·in/1Ibf·in=0.01kgf·m
Connect to other Brands of pipe

insist on rigorous testing to ensure that all of pipes and fittings are manufactured within certain tolerances.
As we are unable to guarantee those tolerances used by other manufacturers, we are unable to recommend our fittings be used with any other plastic pipe or fittings be used with ours.

End Stop

If necessary, not only provides a permanent leak-prevention sealing effect but also enables immediate removal and system extension for re-work. In particular, this is a Push-in design for easy use.
The Stop End is also useful in system pressure testing prior to connection works.
Fully push in the pipe and pull to check it is secure. The release, depress the collet and pull out the pipe.

Mini-Manifold

For maximum flexibility, fittings can be combined to provide multiple functions.

Pipe Bending

To maintain the pipe radius.

For sharp bends, standard elbow fittings can be used. For slight bends it is possible to use the flexibility of the pipe to produce a bend which can be clipped into shape, or tighter still with a 15 cold forming bend, subject to the following limits.

Pipe Size(OD) 1/2" 5/8" 7/8" 1"
10mm 15mm & 16mm 20mm & 22mm 28mm
Min Radius with Clips 100mm 175mm 225mm 300mm
Min Radius with Cold Forming Bend 90mm
Concealed pipework

When installing the system in concrete and masonry, the pipe should be run in conduit pipe with access boxes for the fittings. This ensures that all pipe can be removed for replacement and maintenance, therefore complying with the requirements of the water regulations.

Connecting to a storage vessel

We offer a range of tank connectors in 15 and 22 options for connection to cold water storage tanks.
During installation, do not use any jointing compound on the connector. It should be tightened by hand as further mechanical tightening will damage the fitting.

Connecting to boilers and heaters

A minimum length of 1 metre of copper pipe must be installed before connecting to a pipework system.
To avoid serious overheating, trapped air must be purged from the heating system before the boiler is operated. Always refer to the boiler manufacturer’s installation instructions in the first instance.

Continuously operated recirculating systems (secondary hot water circulation / ring main installations)

Plastic plumbing systems are not suitable for use on any continuously operated recirculating systems (secondary hot water circulation / ring main systems).
These installations differ greatly from traditional domestic installations and therefore pipe and fittings may not be used.

Freezing for maintenance/system modification

We wouldn’t recommend freezing techniques to carry out maintenance on our pipework or fittings. Ensure when installing the system there are suitable isolation valves used for maintenance purposes.

Freezing conditions

Our plastic pipe can be used in freezing conditions. However, to minimise potential failure, the below steps should be followed:

  • Make sure that metal to plastic pipe connections are made in an area where freezing will not occur.
  • Ensure fittings are placed 150mm away from areas where freezing may occur to ensure there is enough free pipe to absorb the expansion caused by freezing.
  • Insulate plastic pipe and fittings where freezing conditions may occur.
Painting pipe and fittings

can be painted with either a water-based paint or an oil-based paint with an undercoat. Cellulose-based paints, paint strippers, thinners, flux, acid-based descalents or aggressive cleaning products must not be used.

Corrosion inhibitors

We’ve tested Flomasta pipes and fittings with Fernox & Sentinel and have approved them for use with our fittings. Flomasta pipes and fittings are also suitable with our Flomasta central heating inhibitor.

Antifreeze

We’ve approved antifreeze which is based on Ethylene Glycol mixtures only.

Electrical safety

Please contact a registered electrical contractor or your local Electrical Authority with regards to bonding, continuity and electrical safety.

UV protection

is suitable for use outdoors, however it should either be painted or covered with insulation to protect against exposure to UV rays.

Pressure testing

It’s essential to carry out a full system check upon completion of an installation. Before carrying out any tests, ensure that all pipe and fittings are installed correctly. We recommend a test of 2 bar for 10 minutes followed by 10 bar for 10 minutes. Any products that are not manufactured by and are unable to withstand the test pressures should be disconnected during the test and capped off using the end stop cap. Pressure testing is NOT a substitute for making sure pipes and fittings are correctly installed. For details on how to make a secure join, refer to the beginning of the installation guide.

you continuing to browse the site, you are agreeing to our use of cookies and privacy notice.
To learn more about our privacy policy, you can click here.