Water Tank Cleaning
Full clean-out of rainwater and storage tanks — concrete, plastic, stainless or fibreglass. We remove the sludge, scrub the walls, sanitise and reconnect. Most households back to normal water the same day.
Tank Cleaning in Waiuku, Pukekohe & Franklin
Professional water tank cleaning, repairs and plumbing maintenance — looking after rural and rainwater tanks across the wider Franklin area for over 35 years.
- ✅ Concrete & plastic water tank cleaning
- ✅ Tank repairs (including concrete tank repairs)
- ✅ Pumps, filters & water treatment
- ✅ Residential, agricultural & commercial
★★★★★ Locally owned & operated, based at 33 Victoria Avenue, Waiuku.
Our Tank Cleaning & Plumbing Services
Whether you've got a single household rainwater tank or ten tanks on a working farm, we've cleaned them all. Sediment, sludge, algae and biofilm removed; tanks left clean, refilled and reconnected.
Tank Repairs
Cracked concrete water tanks resealed, leaks patched, fittings replaced. We specialise in concrete tank repairs — a service most general plumbers don't offer.
Plumbing Maintenance
Pumps, pressure systems, filters and general plumbing maintenance for tank-fed properties. We work with what you've got and keep it running.
Water Treatment & Filtration
Filter installation and servicing, UV systems and water testing so your tank water is safe to drink. Advice on the right system for your property — no upsell.
Tank Installation & Consulting
New tank install, replacement, or rural water-system advice. We'll tell you honestly whether you need a new tank or just a clean and repair.
Water Delivery & Property Maintenance
Water delivery when your tank's run dry, plus general property maintenance work for rural and lifestyle blocks across Franklin.
Why your tank needs cleaning
Rainwater tanks build up sludge on the bottom — leaves, roof grit, dead insects and biofilm. That sediment feeds bacteria, blocks pumps and filters, and gets stirred back into your drinking water every time the tank runs low. An annual clean keeps your water safe and your system running properly.
Areas We Service — Franklin & South Auckland
Based in Waiuku, we cover the whole Franklin district and out into South Auckland. If your suburb isn't listed, give us a call — chances are we're already passing through.
Waiuku & Awhitu
- Waiuku
- Awhitu
- Pollok
- Kohekohe
- Karioitahi
Pukekohe Area
- Pukekohe
- Pukekohe East
- Patumahoe
- Mauku
- Buckland
North Franklin
- Karaka
- Clarks Beach
- Waiau Pa
- Glenbrook
- Kingseat
South & East
- Tuakau
- Aka Aka
- Bombay
- Drury
- Papakura
What our customers say
Verified reviews from public listings on ServiceFinder, Yellow, Finda and Cylex.
★★★★★"Great job done — had 10 tanks cleaned at a good price."
★★★★★"This guy knows his job well. Very happy what he has done."
★★★★★"Excellent job on our new water tanks. He did 6 on site, very clean and all hooked up again."
★★★★★"Best water tank cleaning we have ever had."
★★★★★"Great guy to work with — very experienced in his work."
★★★★★"Just the best out — nice to have a clean tank again."
Frequently Asked Questions
Why do I need my tank cleaned?
Rainwater tanks collect more than just water. Leaves, roof grit, bird droppings, dust and dead insects all wash in and settle on the bottom as sludge. That sludge feeds bacteria, can produce nasty tastes and smells, blocks your pump and filters, and gets stirred back into your drinking water every time the tank gets low or refills hard. A regular clean keeps your water safe, your system running, and your household healthy.
How often should a water tank be cleaned?
We recommend cleaning your tank annually. An annual clean keeps sediment from building up, your water tasting fresh, and your pump and filters working as they should. Tanks under heavy tree cover, or any tank where the water looks, smells or tastes off, may need it sooner.
Can you repair a leaking concrete water tank?
Yes — concrete tank repairs are one of our specialties. We've been doing them across Franklin for over 35 years.
What does a tank clean cost?
It depends on tank size, access and how much sludge has built up. Call us with rough details and we'll give you an honest estimate over the phone before we come out.
Does the cleaning use water?
Yes — clean water is better than dirty water. We use water as part of the process to flush sediment and rinse the tank, and you end up with a tank full of clean, safe water. If your supply is tight, let us know when you book and we'll plan around it.
Do you service Pukekohe and Tuakau?
Yes — we cover the whole Franklin district from Waiuku to Bombay, including Pukekohe, Patumahoe, Tuakau, Karaka, Drury and out to Awhitu.
Talk to Hank directly.
Family-run since 1989. When you call De & Co, you talk to Hank — the same person who'll be looking at your tank. No call centre, no quoting software, just a straight answer.