Blog: commercial heating, gas safety and drains in London
Gas safety, plant rooms, communal heating and drainage for businesses, block managers and landlords across London, and plumbing and heating for homes. Newest first.
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Blocked drain in a block of flats: who is responsible
Who clears a blocked drain in a block of flats (the flat owner, the freeholder or Thames Water), what the 2011 sewer transfer changed, and who pays.
Read the postCommercial boiler servicing: the law and the standards
The legal duty behind commercial boiler servicing, the British Standards for boilers over and under 70 kW, how often to service, and what a visit covers.
Read the postCommunal boiler breakdown: who is responsible and who pays
When a communal boiler fails: who must repair it, how leaseholders pay through the service charge, when section 20 applies, and the gas safety rules.
Read the postCP42 certificates for commercial kitchens, explained
What a CP42 gas safety certificate is, the law behind it, what the check looks at in a commercial kitchen, and how often it should be done.
Read the postGrease trap rules for commercial kitchens in London
The law on fat, oil and grease in commercial kitchen drains: the sewer offence, when a grease separator is needed, and Thames Water's visits.
Read the postHeat network regulation: what it means for a block of flats
Ofgem has regulated heat networks since 27 January 2026. Which blocks are covered, who must register by 26 January 2027, and what stays the same.
Read the postHotel gas safety certificates: guest rooms and kitchens
Which gas safety rules apply to a hotel: the yearly landlord check for guest and staff rooms, the employer's duty for kitchens, and the records to keep.
Read the postLetting agents and gas safety: who holds the legal duty
When a letting agent takes on the landlord's gas safety duty, what the management contract should say, and the deadlines the agent then has to meet.
Read the postBoiler making a banging noise? What it means and what to do
The causes of a banging, kettling or thumping boiler, which checks are safe to do yourself, and when to switch it off.
Read the postHow often should a communal boiler be serviced?
Annual servicing is the baseline for communal boilers and plant rooms. What a service visit covers, why blocks miss them, and how to plan replacement.
Read the postDrain keeps blocking? Why it happens and the real fix
Why a drain that keeps blocking is a symptom of a deeper fault: fat, scale, roots or a collapse, and why finding the cause once ends repeat call outs.
Read the postLandlord gas safety certificate rules, explained
The gas safety rules every landlord must meet: annual CP12 checks by a Gas Safe engineer, deadlines for giving tenants the record, and the renewal window.
Read the postLow boiler pressure: how to top it up safely
What the pressure gauge should read, how to repressurise with the filling loop step by step, and when repeated drops mean a leak or a failed part.
Read the postNo hot water and no heating? Check these first
A checklist for when both fail at once: pressure, thermostat, frozen condensate pipe, tripped electrics, and when it is a genuine emergency.
Read the postQuestion not covered?
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