Appliance Spares
Quick answer: A dishwasher leak usually comes from one of three places — a split inlet (fill) hose, a perished drain hose, or a tripped aquastop safety valve. Find the wet spot, isolate the water, then swap the failed hose. Most replacement inlet and drain hoses are AUD $25–$70, and we stock them with same-day Sydney dispatch.
The part that fixes this
- Delonghi Dishwasher inlet Hose Assembly DEDW4510S, DEDW45S 0331
- Delonghi Dishwasher inlet Hose Assembly DEDW645S, DEDW634SI, DEDW650S, 0331
- Baumatic Dishwasher inlet Hose Assembly BDW1660, BFD671SS, BDW70S, BDW71S 0331
Not sure it is the same on your machine? See every part listed by model number.
Last updated September 2026
Find your exact part with the Oz Part Finder
A pool of water under the dishwasher is alarming, but it is rarely the machine itself — it is almost always a hose. Hoses flex, heat-cycle, and age, and the rubber eventually splits or the connection works loose. The good news: hoses are the cheapest and easiest dishwasher repair you can do, and an exact-fit replacement seals the leak permanently. This guide shows you how to tell which hose has failed, what an aquastop hose actually does, and how to fit a new one safely.
Where dishwasher leaks come from (the 3 usual suspects)
A dishwasher inlet hose is the high-pressure line that brings mains water in; a dishwasher drain hose is the low-pressure line that pumps dirty water out to the sink trap or standpipe. Both can leak, and they leak differently. Pinpoint the source before you buy anything.
| Symptom | Most likely cause | Where you’ll see water |
|---|---|---|
| Water appears only when filling, clean water | Split or loose inlet hose | At the rear right, near the tap connection |
| Water appears during/after the wash, dirty & soapy | Cracked drain hose or loose clamp | Under the machine, toward the sink cabinet |
| No water at all + tap valve feels heavy/clicked | Aquastop tripped (flood-safe valve) | Dry inside, jammed valve at the tap |
| Slow seep, constant damp patch | Perished hose or hardened clamp | Anywhere along the hose run |
Clean water on fill points to the inlet side. Grey, foamy water at the end of a cycle points to the drain side. A machine that suddenly takes no water at all, with a stiff valve at the tap, has tripped its aquastop.
What an aquastop (flood-safe) hose is
An aquastop hose is a flood-protection inlet hose with a spring-loaded safety valve built into the tap end. If the inner hose ruptures or a sensor detects a sudden flow surge, the valve snaps shut and cuts the water before it floods your kitchen. Some Australian dishwashers (Bosch, Miele and many European models) use an electrically controlled aquastop with a wire running to the machine; budget and many local-brand units use a plain inlet hose instead. You can tell them apart easily: an aquastop has a bulky plastic block at the tap connection, often with a thin cable. A standard inlet hose is just hose with a brass or plastic fitting at each end. A tripped aquastop will not reset — once the safety valve fires, the hose assembly is consumed and must be replaced. Do not try to force or “drain” it back open; fit a new assembly. If your model never had an aquastop, you can keep the plain inlet hose — it does the same job at lower cost.
How to tell which hose has failed
Work methodically so you replace the right part the first time. A five-minute check saves a wasted order.
- Pull the machine forward 20–30 cm so you can see the back. Lay an old towel down first.
- Dry everything, then run a short rinse cycle and watch.
- Watch the fill stage: clean water beading at the tap end or along the top hose = inlet hose.
- Watch the drain stage: grey water near the floor or the sink-cabinet end = drain hose or its clamp.
- Check the clamps: a hose can be sound but the clamp loose or corroded — squeeze and inspect.
- Feel the tap valve: if it’s stiff and the machine takes no water, suspect a tripped aquastop.
Note your model number (on the door edge or rim sticker) before ordering — inlet hose assemblies are model-specific because connection types and lengths vary between brands.
Step-by-step: replacing the hose safely
Budget 30–45 minutes. You need a towel, a bucket, and pliers or a flat screwdriver for the clamps.
- Isolate the water. Turn off the dishwasher isolation tap under the sink (usually a quarter-turn lever). If there’s no dedicated tap, turn off the kitchen cold supply.
- Switch off power at the wall — a dishwasher is a 240V appliance and you’ll be working near water. If unsure, use a licensed technician (AS/NZS).
- Remove the kickplate (the panel at the floor) — usually two screws — for access to the hose connections.
- Catch the water. Place the bucket and towel; hoses hold residual water.
- Inlet hose: unscrew the fitting at the tap and at the machine. Drain hose: release the clamp at the pump and at the sink trap/standpipe, then pull free.
- Fit the new hose, hand-tighten fittings (don’t over-torque plastic threads), and re-seat clamps firmly.
- Restore water and power, run a rinse cycle, and watch every joint for drips before refitting the kickplate.
What it costs in Australia (2026)
Hose repairs are the cheapest fix on a dishwasher, which is why a leaking hose is almost never worth a service call alone. Here’s the realistic AUD picture.
| Job | DIY parts only | With a technician |
|---|---|---|
| Inlet (fill) hose replacement | $25–$60 | $150–$250 |
| Drain hose replacement (2m) | $25–$55 | $150–$240 |
| Aquastop hose assembly | $45–$90 | $180–$280 |
| New dishwasher (avoid if hose is the only fault) | — | $550–$1,800 |
A single perished hose almost never justifies replacing a sound dishwasher — the pump, motor, electronics and tub are all fine, and a fresh hose restores the machine to as-new sealing for the price of one part. Fitted yourself with an exact-fit replacement, a quality hose typically lasts another 8–10 years, so the cheapest fix is also the longest-lasting one.
The exact hoses we stock (with same-day Sydney dispatch)
Match your model to the assembly below. Inlet hose assemblies share MPN 674000200041 and the 2m drain hose is MPN 673000900039. If your model isn’t listed, run the Part Finder — we’ll match the exact length and fitting.
| Part number | Fits | Link |
|---|---|---|
 Inlet hose assembly | Delonghi DEDW4510S, DEDW45S, DEDW6015S, DEDW634SI, DEDW645S | |
 Inlet hose assembly | Delonghi DEDW645S, DEDW634SI, DEDW650S, DEDW6012W | Delonghi inlet hose assembly DEDW645S / DEDW634SI / DEDW650S |
 Inlet hose assembly | Baumatic BDW1660, BFD671SS, BDW70S, BDW71S | |
 Inlet hose assembly | Bellini BDW127W-F, BDW127X-F, BDW96W, BDDW605 | |
 Inlet hose assembly | Blanco BDW34X, BDW146X, BFD645X, BDW45X, BSD5X | |
 673000900039 | Stirling / Midea / Damani WQP12-9240AS, DAD6002 (2m drain hose) |
All hoses dispatch same-day from our Sydney warehouse when ordered before cut-off. Confirm your exact model with the Oz Part Finder before ordering.
AU plumbing note — when you need a licensed plumber
Swapping a flexible hose that connects to an existing isolation tap with a screw fitting is a maintenance task most homeowners can do. However, if your dishwasher is hard-plumbed (a fixed copper or fused water connection with no flexible hose and no isolation tap), or if a new tap or tee needs to be installed into the mains, that is plumbing work and must be done by a licensed plumber under state regulations. The same applies if you discover the isolation tap itself is faulty or won’t shut off. When in doubt, isolate the water at the mains and call a licensed plumber — it protects your home and your insurance.
Frequently Asked Questions
How do I know if it’s the inlet hose or the drain hose leaking?
Watch when the water appears. Clean water during the fill stage means the inlet hose. Grey, soapy water during or after the wash means the drain hose or a loose drain clamp. Drying everything and running a short cycle while watching is the fastest test.
Can I reset a tripped aquastop hose?
No. Once an aquastop safety valve fires, it locks shut permanently and the whole hose assembly must be replaced. Don’t try to force or drain it open — fit a new assembly.
What’s the difference between an aquastop hose and a normal inlet hose?
An aquastop hose has a flood-safe valve built into the tap end that cuts water if the hose ruptures. A standard inlet hose is plain hose with a fitting at each end. Replace like-for-like with what your model originally used.
How much does a dishwasher hose cost in Australia?
Most inlet and drain hoses are AUD $25–$70 for the part. Aquastop assemblies run $45–$90. A technician call-out adds $150–$280, so DIY is usually the smart choice for a hose.
Do I need a plumber to replace a dishwasher hose?
Not if it connects to an existing isolation tap with a screw fitting — that’s standard maintenance. You do need a licensed plumber if the machine is hard-plumbed or a new tap/tee must be installed into the mains.
Will any inlet hose fit my dishwasher?
No. Lengths and fittings vary by brand and model, so inlet hose assemblies are model-specific. Match your model number or use the Part Finder to get the exact part.
My dishwasher leaks only sometimes — is it still the hose?
Often yes. An intermittent leak points to a hairline split that only opens under pressure, or a clamp that’s loose. Replace the hose and re-seat the clamps rather than chasing it.
Frequently asked questions
How do I know if the dishwasher inlet hose or drain hose is leaking?
Watch when the water appears. Clean water during the fill stage means the inlet hose, usually at the rear near the tap connection. Grey, soapy water during or after the wash points to the drain hose or a loose clamp. Dry everything, run a short rinse cycle and watch.
Can I reset a tripped aquastop hose on my dishwasher?
No. Once an aquastop safety valve fires, it locks shut permanently and the whole hose assembly must be replaced. Don’t try to force or drain it back open — a tripped aquastop is consumed, so fit a new assembly.
How much does a dishwasher hose cost in Australia?
Most dishwasher inlet and drain hoses are $25-$70 for the part, and aquastop assemblies run $45-$90. A technician fitting one typically costs $150-$280 all up, so DIY is usually the smart choice for a hose — the swap takes 30-45 minutes.
Do I need a plumber to replace a dishwasher hose?
Not if the hose connects to an existing isolation tap with a screw fitting — that’s standard maintenance most homeowners can do. You do need a licensed plumber if the dishwasher is hard-plumbed, if a new tap or tee must go into the mains, or if the isolation tap itself won’t shut off.
Will any inlet hose fit my dishwasher?
No. Lengths and connection fittings vary by brand and model, so dishwasher inlet hose assemblies are model-specific. Note your model number from the door edge or rim sticker before ordering, or run it through the Part Finder to match the exact length and fitting.
My dishwasher only leaks sometimes — is it still the hose?
Often yes. An intermittent dishwasher leak points to a hairline split that only opens under pressure, or a clamp that has worked loose or corroded. Replace the hose and re-seat the clamps rather than chasing the drip.
Related guides
- Find your exact part with the Oz Part Finder
- Dishwasher not draining — pump and filter diagnosis
- Dishwasher not filling — inlet valve and water supply checks
Ready to fix it?
Stop the leak today. Match your model and order the exact inlet or drain hose with same-day Sydney dispatch. Find your part with the Oz Part Finder.
