Spring Plumbing Checklist for Homeowners

Winter's Done — Time to Check the Damage

Spring is here, and if your plumbing survived another British winter, it deserves a round of applause. But before you forget about your pipes until next November, now is the ideal time to give your plumbing system a once-over. Winter takes a toll — freezing temperatures, increased boiler use, and general wear and tear can leave hidden problems waiting to catch you out.

We're Scott and Fraser from Blimp Plumbing, and spring is one of our busiest times because people start discovering problems that developed over winter. Here's our spring plumbing checklist for homeowners in Portsmouth and Hampshire.

1. Check Your Pipes for Frost Damage

Frozen pipes are a winter staple, but the damage doesn't always show itself immediately. When water freezes inside a pipe, it expands and can crack the pipe. Sometimes that crack is tiny and only starts leaking once the ice thaws and normal water pressure returns.

What to check:

• Look at visible pipework in your loft, garage, and under sinks for damp, dripping, or staining
• Check beneath radiators for small puddles
• Look at ceilings below your loft space for damp patches
• Inspect external taps and their feed pipes

If you spot anything suspicious, get it looked at now. A small pipe repair in spring is infinitely cheaper than a burst pipe flooding your kitchen next winter.

2. Test Your Stopcock

Your stopcock is the valve that shuts off the mains water to your home. In an emergency, you need it to work instantly. Spring is a great time to test it.

• Find your stopcock (usually under the kitchen sink)
• Turn it clockwise to close, then run a cold tap to confirm the water stops
• Turn it back on (anti-clockwise)

If it's stiff, seized, or leaking, get it replaced now while there's no urgency. Don't wait for an emergency to discover it doesn't work.

3. Inspect Your Boiler

Your boiler has been working hard all winter. Before you switch it down to hot water only for the warmer months, give it a quick check:

• Check the pressure gauge — It should read between 1 and 1.5 bar. Below 1 bar means it needs repressurising. Consistently losing pressure could indicate a leak in the system.
• Look for error codes — Modern boilers display fault codes. If yours is showing anything unusual, make a note and call us.
• Listen for unusual noises — Banging, kettling (a whistling sound), or gurgling that wasn't there before can indicate limescale build-up or air in the system.
• Book an annual service — If your boiler hasn't been serviced in the last 12 months, spring is the perfect time. Engineers are less busy than in the autumn rush, so you're more likely to get a convenient appointment.

An annual boiler service costs around £60 – £100 and can catch small issues before they become expensive breakdowns. It also keeps your manufacturer's warranty valid.

4. Bleed Your Radiators

If any of your radiators had cold patches at the top during winter, they've got trapped air. Bleeding them takes five minutes and makes a noticeable difference to heating efficiency.

How to bleed a radiator:

1. Turn your heating on and let the radiators warm up
2. Feel each radiator — if the top is cooler than the bottom, it needs bleeding
3. Turn the heating off and wait for the radiators to cool slightly
4. Using a radiator key (available from any hardware shop for about £1), slowly turn the bleed valve anti-clockwise
5. You'll hear a hissing sound as air escapes. Once water starts coming out, close the valve
6. Check your boiler pressure afterwards — bleeding radiators can drop the pressure, so you may need to top it up

If you have to bleed the same radiators repeatedly, or if you've got radiators that are cold at the bottom (which suggests sludge rather than air), your system might benefit from a powerflush. This is part of our central heating service.

5. Check Your Outside Taps and Pipes

If you turned off your outside tap for winter (and you should have), spring is the time to turn it back on. Open the isolation valve, turn the tap on, and check for leaks at the tap and along the pipe. While you're outside, check the boiler flue is clear of debris, bird nests, or plants that might have grown over it.

6. Inspect Under Sinks and Around Toilets

Grab a torch and have a look under every sink in your house. Check around the base of every toilet. You're looking for:

• Damp or water staining on the cabinet floor or wall
• Drips from joints in the waste pipe or supply pipes
• Mould or mildew — a sign of a slow, persistent leak
• Soft or discoloured flooring around the toilet base

Leak repairs caught early are straightforward and cheap. Leaks left to fester can cause rotten flooring, structural damage, and mould problems that cost hundreds or thousands to put right.

7. Test Your Drains

Winter can be rough on drains. Run each tap and flush each toilet to check water drains quickly. Clear debris from external drain covers and pour a kettle of hot water down each sink to shift any grease build-up.

8. Check Your Bathroom Sealant

Winter condensation takes a toll on bathroom sealant. Check the silicone around your bath, shower tray, and basin for black mould, peeling, or gaps where water could get behind tiles. Failed sealant lets water where it shouldn't go, causing damp and structural damage. Replacing silicone is a small job that prevents big problems — or it might be time for a full bathroom refresh.

9. Book a Gas Safety Check

If it's been more than a year since your last gas safety check, book one now. This is especially important for:

• Landlords — It's a legal requirement to have an annual gas safety certificate for rental properties
• Homeowners with older boilers — Older appliances are more prone to carbon monoxide issues
• Anyone who hasn't had their gas appliances checked recently

We carry out gas safety checks across Portsmouth, Fareham, Gosport, Havant, Waterlooville, and Chichester, with same-day certificates.

The Five-Minute Version

Short on time? Here's the absolute minimum:

1. Check visible pipes for leaks or frost damage
2. Test your stopcock — make sure it turns
3. Bleed your radiators if they had cold spots
4. Look under sinks for drips or damp
5. Book a boiler service if you're overdue

That's 20 minutes of your Saturday that could save you hundreds in emergency repairs.

Need a Hand?

If you've found something that needs attention — or you'd rather have a professional give your plumbing the once-over — Blimp Plumbing covers Portsmouth, Fareham, Gosport, Havant, Waterlooville, and Chichester. Give us a call or WhatsApp and we'll get it sorted before barbecue season.