BS5306 Part 1 1989, section 37 recommends that all Dry Risers should be
inspected at least twice per year. One of these inspections can be visual whilst
the other must involve more rigorous testing. Davenheath-OTS can offer customers
two levels of support with these tests, a synopsis of each type is provided
below, but please do contact our office in order to ascertain the type of test
you may require at your premises.
Inspection visit; Davenheath-OTS can undertake an inspection
visit for you:
The dry riser inspection will entail a visual inspection of
the system, checking locking arrangements and door hinges to all inlet
and landing valves. Check glass door, all straps and padlocks; valves,
spindles, glands and seals to each valve.
A test report will be given to the client after each visit.
Managed tests; with Davenheath-OTS expertise we are able to
arrange and supervise pressure tests in conjunction with your Fire
Authority, the test may be either a Wet pressure test or a Low pressure air
test
Wet pressure tests – these are conducted with all valves
closed and the system is pressurised by means of a mobile fire tender or
a specialised trailer/vehicle to 10 bar for 15 minutes. Check list
includes air valve, whole system for leaks and drain riser.
Low pressure air leak test can be conducted in conjunction
with the wet pressure test; again all valves are closed and the air
relief valve is removed and sealed for the test. The system will be
pressurised by means of Air Compressor to ½ bar for 15 minutes. The
valve at the top of the riser is manually checked and reinstated. The
air leak test can be carried out on air where appropriate e.g. 1st visit
to guard against water damage, as an addition to a wet pressure test.
A test report will be given to the client after each visit.
