Q&E Frequently Asked Questions
YES, Q&E is manufactured to BS EN 15875.
The system must keep within British design standards. i.e high limit cut off switch required
What effect will screed have on Q&E if we bury it underground?
Will have no effect on the pipe but they would be contravening Water & Building Regulations by not putting it in conduit or ducting if used for hot and cold water supply.
Can I use 15mm Q&E pipe as a discharge pipe from a boiler safety valve?
No, this has to be copper.
How do i connect to a 15mm straight radiator connectors?
You can use a compression nut&insert (1058934) or Chrome rad connector (1023045).
Can we use Q&E to carry oil?
No, regulations state soft copper must be used for this purpose.
Can we use Q&E pipes and fittings with salt water?
Yes, this will have no effect on the pipes and fittings.
Can we plaster over Q&E piping in a wall?
Yes, plaster will not have any effect on the piping. Although we recommend they are buried deep enough not to crack the plaster surface, ideally chased into the brick work.
Can we bury Q&E underground?
Normal pipe depth below ground is a minimum 600mm therefore the Q&E Pipe would not withstand the weight of any soil on top of it. However it can be buried in an insulated duct, sealed at both ends.
Is there a Q&E fitting available that goes straight onto a Thermostatic Radiator Valve such as a Danfoss?
Q&E will fit directly into most TRVs with the use of a compression nut & insert (1058934).
Can we use Q&E piping outside, i.e. under decking?
This is not really recommended due to frost, sunlight, etc.
Can we use any lubricant on Q&E fittings?
No, lubricant will invalidate the guarantee and may contravene WRAS approvals
Can Q&E be used to convey gas?
No, The pipe is NOT designed for gas
Whats the lowest temperature water Q&E can carry?
With an Ethylene Glycol based antifreeze it can carry as low as -20°c
Can Q&E convey de-mineralised water?
Yes, this will have no effect on the pipe.
Does Q&E require insulating?
Yes, Q&E should be insulated in exactly the same way and to the same thickness as copper.
Does Q&E form condensation like copper pipe?
Not to anything like the same degree.
Can we use Q&E piping with an Oil boiler?
Please refer to Boiler recommended installation instructions.
Can we do an air pressure on Q&E?
No we do not recommend compressed air, only a water pressure test. Water will identify any small leak, and is far safer. Use of leak detecting fluids with an air test may damage the fitting and would invalidate the guarantee
Can Q&E pipe & fittings be used on a power shower?
What is the general rule of thumb for pressure testing a Q&E system?
First carry out a low pressure water test at 0.5 – 1 bar when the system is just demountable fittings, then a pressure test at 1.5 x the normal working pressure with a recommended minimum of 10 bar for a minimum of 45 mins.
Is Q&E suitable for use on a solid fuel Cooker? AGA?
No, due to the uncontrolled temperature the cooker has potential to reach excessive temperatures. Copper must be used.
How far away should we position Q&E pipe from downlighting?
Fire regulations state this must be positioned a minimum of 150mm from the downlighting.
Can we used Q&E for running compressed air through?
No it is not recommended for this.
What is the maximum working pressure for cold water using Q&E?
12 bar at 20 deg
What is the flow rate for 16mm Q&E pipe?
1. 1 litre/minute.
Can we freeze Q&E pipe?
Yes you can, you will need to gently squeeze the pipe with a pair of mole grips before freezing. This will ensure that when the ice plug has been formed it doesn’t shoot out the open end when the pipe is cut.
Can we use expanding foam on Q&E?
No, due to the chemicals when in its liquid form, these could harm the pipe. Once the expanding foam has cured Q&E pipe can be safely fed through it. Alternatively the Q&E could be sleeved to give the required protection.
What are recommendations for lagging Q&E?
This is exactly as it would be for copper please refer them to the current water regulations.
What is the Thermal Expansion of Q&E?
The thermal linear expansion of PB (Q&E pipe) is 0.00013. 1 metre of pipe will expand by 0.13mm for every 1°C rise in temperature. Therefore 1m of pipe will expand to 1.3mm with a 10°C rise.
Can we put Q&E through a hole in a wall?
Yes, but it should be protected with either a sleeve or temporally taped over to avoid the pipe being scratched, and then the tape must be removed after insertion through the wall.
How do we adapt from half inch lead pipe to 16mm Q&E?
We do not produce a purpose made fitting, however this can be achieved with the use of a compression fitting designed for use on ½” lead pipes, along with a MALE IRON in the Q&E pipe end.
Can we use Q&E in an Aquarium?
We can only state that our Q&E is WRAS approved for drinking water.
Is Q&E susceptible to ultra violet light?
Yes, as are all plastics to an extent. Where Q&E is used externally it should be waterproofed lagged to give thermal and ultra violet radiation protection.
What are the effects of inhibitors on Q&E pipe?
The use of recommended inhibitors from the FERNOX and SENTINEL ranges will have no effect on pipe performance.
Can we use Q&E on a condensate drain from a condensing boiler?
Can we run de-ionised water through Q&E pipe?
Yes, it is perfectly safe for this use.
Can we install an Electronic Limescale Remover on Q&E pipework?
We need to connect Q&E to an incoming blue MDPE service pipe?
Please use our compression nut & inserts or Q&E male irons.
We require information on how Eco-friendly to the environment Q&E pipe is?
Refer to the Q&E Technical guide.
How much water does Q&E pipe hold per metre?
16mm pipe = 120ml, 20mm pipe = 240ml, 25mm pipe= 360ml
Can we use Denso tape on Q&E pipe?
No. Denso tape should not be allowed to come into contact with Q&E.
Can we use Q&E fittings on soft copper?
Are Q&E 16mm fittings compatible with old 15MM Q&E pipe?
Yes although the OLD Q&E pipe will require a liner to a compression fitting PLUS a nut and insert at the other end to connect 16MM Q&E.
How do we blank Q&E for testing?
The blanking elbow is recommended for radiator circuits (1042320) or Uponor Test plugs maybe used for standard tests.
Can I use Q&E in hard water areas?
Yes, the smooth bore of Q&E prohibits scale build up.
Can I use Q&E in soft water areas?
Yes, unlike copper, no matter how soft (acidic) the water is, it will not corrode Q&E pipe.
Does chlorine have an adverse effect on Q&E pipe?
Sustained exposure to chlorine above 0.5ppm (parts per million) should be avoided. These conditions do not normally arise in UK potable water supplies. Q&E is not suitable for use in high chlorine concentration systems – i.e. swimming pools or decorative water features.
What are the different colour rings for?
The rings are to be used for all Q&E connections, and are coloured for: Blue=cold , Red=Hot.
This will prevent cross connections to pipeworks dueing installation.
When was Q&E introduced?
Standard pipe was introduced in 1980 in the UK under WIRSBO, and has in 2012 completed 40 years in production throughout Europe and the world.
Would contact from polystyrene insulation affect polybutylene?
Is there a minimum radius which Q&E pipe can be bent?
Yes, this is 7 x the pipe diameter.
What happens if I kink Q&E pipe?
Whilst this should be avoided there is no need to discard the pipe as it may only reduce the pipe strength by approx 10%. However if the wall of the pipe is damaged in any way this must then be repaired or replaced.
Can we trace heat Q&E pipe?
Can we embed Q&E pipe into plaster gypsum structures?
Yes, this will have no detrimental effect on the pipe.
Can we use Q&E as a discharge from a macerator (e.g. Saniflo)?
NO this is not recommended.
The Q&E threaded fittings are plastic, do I need to use a special jointing tape?
Yes, they will need to use PTFE tape with the fitting or loctite 55. Do NOT use Boss White on the fitting.
We need conduit for 25mm Q&E pipe.
You can use individual rolls of Uponor conduit. Refer to Uponor price guide.
Do we need to insulate Q&E pipe to prevent heat loss?
Yes in exactly the same way as copper.
Will silicone sealant have any adverse effect on Q&E pipe?
How close to a Q&E fitting can we apply heat on a copper pipe?
Advise a minimum distance of 12″ with a cold wet rag wrapped around the copper pipe to limit the amount of heat transfer through the pipe.
Can we use Q&E on a solid fuel boiler?
No, because the maximum water temperature of solid fuel boilers is uncontrolled and can reach excessive temperatures.
What forms of isolation valves are suitable to use on central heating?
Any gate valves or Ball valves are suitable for this use c/w Q&E Adaptors.
Are there any particular metal tape that is suitable for use on Q&E pipe?
No tape should be installed onto our Q&E pipe and fittings.
Do we know of a company that produce plastic pipe with a metal barrier enabling it to be picked up with a metal detector?
We do a product known as MLCP which has an aluminium layer within the wall thickness of the pipe.
Can Q&E pipe be used for Underfloor Heating?
YES, we would suggest that you contact us for this application.
Can we use Q&E on solar heating?
Q&E should not be used for primary circuit of a solar heating system as the temperature cannot be thermostatically controlled.
Can we use Q&E on an oil boiler?
Refer to the oil boiler manufacturer.