Heat pumps and eco-friendly heating options
Some plumbers also work on or alongside heat pump installations, though this is often a joint job with a heating engineer for the heat pump unit itself. If you're considering moving away from a gas boiler, it's worth asking whether your plumber does this work directly or partners with someone who does.
Understanding the labour vs materials split
Materials — pipework, fittings, a new boiler or bathroom suite — are often a smaller share of a plumbing quote than labour, particularly for jobs involving lifting floors or chasing walls. If a quote looks unusually cheap, check whether it specifies the same brand/quality of fittings as a competing quote, not just a lower labour rate.
Hard water and your plumbing
In hard water areas, limescale builds up inside pipes, taps, showerheads and boiler heat exchangers over time, gradually reducing efficiency and flow. A plumber working in a hard water area may recommend a water softener or scale inhibitor as part of a boiler installation, particularly for a system that's expected to last 10+ years.
First fix and second fix plumbing
On a new build or extension, "first fix" is running pipework through walls and floors before they're closed up; "second fix" is fitting the visible taps, radiators and appliances once decorating is done. Timing this with other trades on site matters — pipework needs to be pressure-tested before it's covered over, not after.
When plumbing work needs a Gas Safe engineer instead
Plumbers can install and repair most water systems, but any work on a gas appliance or gas pipework — a boiler, a gas fire, a gas hob — is illegal for anyone who isn't on the Gas Safe Register, by law. If a job involves both plumbing and a gas connection (moving a boiler, for example), check whether your plumber is also Gas Safe registered before booking.
Plumbing in a washing machine or dishwasher
Both need a cold water supply, a drain connection, and in most cases their own isolation valves so they can be disconnected without turning off water to the whole property. Using a shared valve with another appliance is a common shortcut that makes future repairs more disruptive than it needs to be.
When a drain camera survey is worth it
For a recurring blockage, tree root ingress, or before buying a property with an older drainage system, a CCTV drain survey shows the actual condition of the pipework rather than guessing from symptoms alone — worth the cost if a blockage keeps coming back despite repeated clearing.
Plumbing in older and period properties
Older properties sometimes still have lead or galvanised steel pipework, which can affect both water quality and pressure, and original layouts weren't designed around modern demand for multiple bathrooms. A plumber working on a period property will often check what the existing pipework is made of before quoting for anything beyond a like-for-like repair.