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Boiler Installation in Theydon Bois

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  • Gas Safe registered, trading since 2009
  • 12-month workmanship guarantee
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DJ's Plumbing Services installs boilers in Theydon Bois, where the housing is mostly larger detached properties on generous plots, alongside the Victorian houses near the green. With several bathrooms common, the right system is often a system boiler with a hot water cylinder rather than a combi.

Every installation starts with a survey and heat loss calculation. We route new pipework and the flue to current regulations, cleanse the system and add inhibitor to BS 7593, complete the Benchmark commissioning checklist, and notify the installation through Gas Safe for Building Regulations.

What's Different in Theydon Bois Homes

  • Houses with three or more bathrooms usually need a system boiler with a correctly sized cylinder, or an unvented cylinder, to keep pressure steady when several outlets run at once.
  • Unvented cylinders must be fitted and serviced by a G3-qualified engineer, and need an annual check of their safety valves.
  • Victorian houses near the green may still have a regular boiler, a cylinder and loft tanks, which can be converted to a sealed system.
  • Large houses with long pipe runs can benefit from splitting the heating into zones, so rooms that aren't used aren't heated.
  • Hard water makes the system cleanse and inhibitor, and a scale reducer where needed, important for a new boiler's life.

How the Job Runs

  1. 1Survey and heat loss calculation to size the boiler correctly
  2. 2Removal of any old back boiler, cold water tanks, or cylinder
  3. 3New pipework run to the chosen boiler location
  4. 4Flue routed and positioned to current regulations
  5. 5System cleanse and inhibitor dosing to BS 7593
  6. 6Benchmark commissioning checklist completed and signed
  7. 7Installation notified through Gas Safe for Building Regulations
  8. 8Coordination with a qualified electrician for any new wiring
More about our boiler installation service

What Our Customers Say

103 verified reviews on Checkatrade, rated 9.96/10

Verified Result

"Dan and his team carried out a full bathroom renovation including stripping back to brick, plastering, tiling and fitting new furniture. Work completed to high standards. Would recommend!"

Bathroom InstallationRomford, Essex
Verified Result

"Dan did an amazing job when we urgently needed help with a leaking pipe. He replaced it with ease and returned to pave the damaged ground. Takes pride in his work."

Emergency RepairEssex
Verified Result

"Dan helped with a complex boiler job that required 3 separate call outs and managed to get it sorted with no fuss. Honest and reliable. Value for money parts and services."

Boiler InstallationEssex

Boiler Installation in Theydon Bois: Questions

Clear answers to your most common plumbing concerns.

Combi or system boiler for a larger Theydon Bois house?
In a house with two or more bathrooms that may be used at the same time, a system boiler with a cylinder generally performs better than a combi, which heats water on demand and can only supply so much at once. In a smaller house or one with a single bathroom, a combi is often the simpler, cheaper choice. We base the recommendation on the survey.
What's an unvented cylinder, and do we need one?
It's a hot water cylinder fed directly from the mains, so every tap and shower gets mains pressure without a loft tank. It suits larger houses with good mains flow. It has to be fitted by a G3-qualified engineer and checked annually, because it holds hot water under pressure.
Can the heating be split into zones in our house?
Usually, yes. Adding zone valves and separate controls lets you heat, for example, the living areas and the bedrooms on different schedules. It's easiest to do during a boiler installation, when the system is drained down anyway.
What happens to our old tanks in the loft?
If you're converting to a sealed system, we drain and remove the old cold water and feed-and-expansion tanks, cap the redundant pipework, and leave the loft clear. Removing them also removes the risk of a tank overflowing or freezing.

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