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WorksheetsMaintenance 6035 Revision
Total questions: 40
Worksheet time: 20mins
What is the correct remedy for a cold tap installed on the incorrect side of the basin?
Remove basin and rotate
Re-pipe both taps to same side
Isolate hot & cold supplies, drain, alter pipework and swap taps over (Hot left / Cold right), refill and test
Add mixing valve below basin
What is the correct remedy for insufficient pipework support on cold water pipes?
Paint pipework for visibility
Isolate and drain, remove section, install clips to correct distances, reinstall, fill and test
Replace pipes with flexible hose
Increase water pressure
How should a rising main without an isolation valve before CWSC be corrected?
Remove CWSC
Install stopcock at kitchen sink
Isolate and drain, install isolation valve local to CWSC, refill and test
Install a pump before the CWSC
What is the remedy for a CWSC with no float operated valve (FOV)?
Install a ball valve below the tank
Install Part 2 FOV, refill, test and adjust level to 25mm below overflow
Raise the CWSC
Reduce the pipe size
What should be done if CWSC has no overflow/warning pipe?
Fit an internal baffle
Install overflow pipe to safe termination outside and screened vent
Lower the water level
Plug the tank overflow
What is the solution for a CWSC not protected against temperature changes?
Paint it white
Move it indoors
Install bylaw 30 kit for insulation and contamination protection
Reduce tank size
How should stagnation in CWSC be prevented?
Fit a mixing valve
Increase tank height
Install FOV opposite outlet, plug old FOV hole, refill, test and adjust level
Add chemicals to tank
What is the correct fix for insufficient drainage opportunities on the cold system?
Install a tap at the highest point
Install drain-off valve after main isolation
Fit flexible hoses at all points
Add multiple CWSCs
How do you fix a leak from an incoming mains compression joint?
Wrap in PTFE tape only
Tighten joint, if leak persists, isolate and replace joint, refill and test
Increase mains pressure
Add external clip
What should be done if cold pipes are in contact with hot pipes, causing warming?
Wrap both pipes in the same insulation
Insulate hot only
Install cold pipes 50mm below hot pipes, isolate and drain first, then refill and test
Reverse flow direction
What is the remedy if CWSC size is insufficient?
Reduce hot water use
Install a smaller HW cylinder
Isolate, drain, install new 115L CWSC, adjust FOV, install bylaw 30 kit, fill and test
Fit additional insulation
What is the remedy if the hot tap is in the incorrect location?
Paint taps red and blue
Add TMV valve under basin
Isolate supplies, drain, alter pipework, swap taps, refill and test
Move basin to other side
What’s the remedy for insufficient pipework support on hot water system?
Install additional lagging
Isolate, drain, remove section, install clips at correct distances, reinstall, refill and test
Raise all pipework
Fit flow restrictor
What should be done for insufficient pipework insulation?
Paint pipes with heat-resistant paint
Install pipe insulation 1m from the cylinder
Move cylinder
Lower water temperature
How is an incorrectly installed hot water draw-off remedied?
Replace entire system
Fit a new vent pipe
Replace with machined bend (<90°, 450mm min from vent), refill and test
Install TMV valve
What should be done if the system has no temperature controls?
Set boiler lower
Install cylinder stat 1/3 from bottom, connect to wiring centre, set to 55°C and test
Insulate the cylinder more
Use manual check every day
What’s the fix for insufficient drainage on the hot water system?
Drain via immersion
Use towel rail as drain
Install tee with drain-off valve at lowest point, refill and test
Open cold feed
What is the remedy for no isolation valve on cold feed?
Add stopcock to HW cylinder
Install a 22mm full way gate valve 1m from CWSC out of child’s reach, refill and test
Install PRV
Remove CWSC
How is incorrect vent pipe installation fixed?
Reduce vent pipe size
Add stop end
Replace 15mm with 22mm pipe, terminate 75mm above CWSC waterline, refill and test
Install bypass
How is incorrect cold feed installation fixed?
Insulate feed
Replace 15mm section with 22mm, refill and test
Add pressure reducing valve
Reverse flow direction
What’s the fix for insufficient drainage in a heating system?
Drain via boiler
Fit drain-off valve at highest point
Install tees with drain-off valves at lowest points, refill, vent and test
Install radiator vent caps
What is the remedy for a missing radiator blanking cap?
Fit new radiator
Isolate radiator, install blanking cap, fill, vent and test
Seal with tape
Fit TRV
How do you fix a radiator with no bleed vent?
Seal radiator permanently
Install new radiator
Isolate, install bleed vent, refill and test
Lower water temperature
What should be done if the TRV head is missing?
Replace radiator
Fit standard valve
Install thermostatic control head, test function
Turn off the lockshield
What’s the remedy for a broken lockshield valve?
Cap radiator
Isolate, drain, fit new valve and cap, refill and balance system
Replace TRV
Open vent pipe
What’s the correct action if the filling loop is missing?
Fill from mains directly
Bypass the need for filling
Install tees from mains to primaries, fit filling loop, test
Add expansion vessel
What should be done for insufficient heating controls?
Use manual switches
Install programmer and room-stat, wire to centre, test system
Install bypass valve
Add cylinder thermostat
How do you remedy insufficient supplementary bonding?
Wrap wires around pipe
Bond boiler casing only
Install earthing clamps and cross bond to earthing cable
Paint pipes
What is the fix for insufficient pipe support in central heating?
Isolate, drain, remove pipework to boiler, install clips at correct spacing, refill, vent and test
Lay pipes flat on floor
Lag pipes
Add TRV
How do you repair a leaking compression joint?
Use sealant
Replace pipework entirely
Tighten joint, if needed replace, refill, vent and test
Increase temperature
What’s the fix for inadequate basin branch size?
Use flexible hose
Replace pipe with 40mm after 1.7m
Lower the basin
Add vent pipe
How do you fix waste pipework with insufficient support?
Add tape for support
Add clips, mark holes, drill and fit plugs, screw clips securely
Insulate pipes
Raise floor
What is the remedy for insufficient basin gradient?
Add sump
Remove pipe, ensure 1/40 fall, drill for clips, install and test
Add inline fan
Extend pipe horizontally
What is the fix for incomplete stub stack termination?
Cap stack
Install AAV 1.7m above ground, reconnect and test
Increase pipe size
Move WC
What should be done with a hole in guttering?
Plug hole with mastic
Replace section and clip every meter, ensure 1/600 fall
Paint over it
Install extra bracket
How is an inoperative WC flush fixed?
Adjust float valve
Replace cistern
Install new flush button, test function
Add overflow pipe
What’s the remedy for insufficient guttering support?
Use string to suspend
Reclip with 1m spacing, ensure 1/600 fall
Increase pipe diameter
Paint clips red
What is the fix for insufficient downpipe support?
Fit clips no more than 1.8m apart, mark, drill and screw securely
Install gutter guard
Replace entire downpipe
Extend with flexi-hose
What is the remedy for insufficient guttering gradient?
Raise lower end
Remove guttering, mark 1/600 fall, clip every 1m, install and test
Shorten guttering
Add larger outlet
How is a guttering installation completed to prevent leaks?
Seal with tape
Cap open ends with stop caps and test
Add overflow pipe
Remove downpipe
