Bristan Nero NR 1/2 C Fitting Instructions & Contents List Download Page 6

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IMPORTANT

IMPORTANT ---- PLEASE READ

PLEASE READ

These fittings need to be installed in accordance with the follo

These fittings need to be installed in accordance with the following Installation Requirements and

wing Installation Requirements and

Notes (IRN) to ensure they meet the requirements of the Water Su

Notes (IRN) to ensure they meet the requirements of the Water Supply (Water Fittings) Regulations

pply (Water Fittings) Regulations

1999 and the Scottish Byelaws 2004.

IRN R001 (NR

IRN R001 (NR ½

½ C, NR

C, NR

C, NR ¾

¾ C, NR TBAS C, NR BASNW C, NR BID C, NR BF C, NR BSM C)

C, NR TBAS C, NR BASNW C, NR BID C, NR BF C, NR BSM C)

See text of entry for Installation Requirements or Notes.

IRN R006 (NR

IRN R006 (NR ½

½ C, NR

C, NR

C, NR ¾

¾ C, NR TBAS C, NR BASNW C, NR BID C, NR BF C)

C, NR TBAS C, NR BASNW C, NR BID C, NR BF C)

This tap or combination tap assembly has a Type AUK3 air gap and is therefore for installation in any premises
to protect against a backflow risk up to a Fluid Category 5.

IRN R010 (NR TBAS C, NR BF C, NR BID C, NR BSM C, NR BASNW C)

Schedule 2

Schedule 2----15 (1)

15 (1)

Water supplies shall be a reasonably balanced pressures from a common source (e.g. hot and cold supplies
both from the same storage or both from a supply pipe). Where the fitting is supplied from unbalanced
supplies (e.g. hot and cold supplies from separate sources) a ‘‘‘‘Listed

Listed

Listed’’’’ single check valve

single check valve

single check valve or some other no

less effective backflow prevention device shall be fitted immediately upstream of both hot and cold water
inlets.

IRN R040 (NR BSM C)

Schedule 2

Schedule 2----15 (1)

15 (1)

The fitting shall be installed so that its outlet discharges above the spill-over level of any fixed appliance as
indicated below:-

For backflow protection in domestic or installations up to, and

For backflow protection in domestic or installations up to, and including, Fluid Category 3.

including, Fluid Category 3.

If the fitting cannot be installed as indicated in the table it shall be installed:

a) with an approved double check valve assembly or some other no less effective backflow
prevention device immediately upstream of the inlet; or

b) so that it draws water by gravity only from a cistern, or cylinder having a
permanently open vent pipe, and the distributing pipe supplies no other fitting (other than
draining tap) at a lower level.

For backflow protection in premises or installations up to, and

For backflow protection in premises or installations up to, and including Fluid Category 5.

including Fluid Category 5.

The vertical distance of the outlet above the spill-over level shall be not less than 20mm or twice the diameter
of the inlet pipe to the fitting, which ever is the greater.
If the fitting cannot be installed as indicated it shall be installed with a backflow prevention arrangement
suitable for the Fluid Category.

70mm

3. Exceeding 3/4 in

25mm

2. Exceeding 1/2 in but not exceeding 3/4 in

20mm

1. Not exceeding 1/2 in

Vertical distance of outlet above spill-over level.

Size of tap or combination fitting.

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