Understanding Pressure Drops After a Service
It’s not uncommon for homeowners in Blackmoor to notice their boiler losing pressure shortly after a professional service. While routine book your boiler service ensures heating efficiency, a small oversight can lead to a slow leak. In many cases, loose fittings around valves and pipe connections are the main culprit.
Why Does Pressure Matter?
Maintaining the correct pressure (typically 1.0–1.5 bar when cold) is crucial. Low pressure can trigger fault codes, cause uneven heating and even lead to a full heating breakdown. If you live in Blackmoor or nearby GU35 areas like Bordon, Alton, Liphook or Petersfield, a quick pressure check after servicing can save you from cold evenings.
Spotting Loose Pipe Fittings in Blackmoor Properties
During a routine boiler servicing, engineers may adjust valves or drain sections of the system to carry out safety checks. In some cases, a fitting that’s not properly tightened can allow water to escape over time.
Common Areas for Leaks
- Filling loop connections (you’ll often find these near the boiler’s base).
- Compression fittings on copper pipes.
- Isolation valve joints on radiators.
- Joint seals around the pressure relief valve.
How to Inspect Fittings Yourself
Before calling in a Gas Safe engineer, you can carry out a quick visual inspection. Here’s how:
- Turn off the boiler and let it cool down.
- Open the boiler casing (if you’re comfortable) and look for damp patches.
- Check around the filling loop—sometimes a loose nut can drip slowly.
- Inspect radiator valves and pipe joints for tiny droplets.
Simple Steps to Tighten a Loose Fitting
If you spot a slight seepage, you can often nip the problem in the bud yourself:
- Isolate the system: Switch off the boiler and close the main shut-off valve.
- Drain pressure: Attach a hose to the drain cock and release water into a bucket until pressure reads zero.
- Use the correct tool: A compression spanner or adjustable wrench works best.
- Gently tighten: Turn the fitting a quarter to half a turn—avoid over-tightening.
- Refill and test: Reopen the shut-off valves, top up to 1.2 bar, and watch for leaks.
If you’re uncertain at any stage, it’s best to stop and get professional help.
Preventive Tips for Radiator Problems
Loose fittings aren’t the only cause of pressure loss. Bleeding radiators in Farnham, Haslemere or Whitehill can introduce air, lowering system pressure. After bleeding each radiator:
- Check the boiler gauge and top up if it falls below 1.0 bar.
- Run the heating on a low setting for a few minutes to settle the water.
- Inspect under the boiler for drips.
When to Call a Professional in Blackmoor
If your DIY tightening doesn’t solve the issue within a day, or if you spot corrosion around pipework, it’s time for expert intervention. Our local Gas Safe engineers can perform a thorough leak test, replace worn seals, and ensure your boiler remains safe and efficient.
Perhaps you’re considering a new boiler installation to avoid recurring leaks. We’ll guide you through the best options for your home in Alton, Liphook or Petersfield.
For ongoing peace of mind, ask about our comprehensive boiler cover. It includes annual checks, emergency callouts and unlimited parts cover, perfect for preventing pressure issues before they start.
Frequently Asked Questions
Q: How often should I check my boiler pressure?
A: We recommend a quick weekly check, especially in colder months. Maintain 1.0–1.5 bar when the system is cold.
Q: Can I tighten fittings on a hot boiler?
A: No. Always let the boiler cool and isolate the system before attempting any adjustments.
Q: Will loosing pressure affect my hot water supply?
A: Yes. If pressure drops too low, combi boilers may shut off hot water as a safety measure.
If you need help with your heating or boiler, our local engineers are here to help. Call us on (01420) 558993
Written by Embassy Gas — your local heating experts covering Blackmoor, Bordon, Alton, Liphook and surrounding areas.