Domakihub Replace Kitchen Sink Supply Hoses Before They Burst
A practical guide to swapping the braided flexible lines under your kitchen sink — before a slow weep becomes a flood.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
The braided stainless hoses tucked beneath your kitchen sink are the most ignored plumbing components in the house — until one fails. Watch the video above for a clear visual walkthrough, then follow the steps below to complete the job safely and correctly, whether you own a family home, a holiday rental, or run a hotel property in Greece. In Greece's notoriously hard-water regions, mineral scale accelerates hose wear, making proactive replacement one of the highest-value maintenance tasks you can do for under €20.
Why Supply Hoses Fail Faster in Greece
Greek tap water — particularly in Attica, Crete, and the Aegean islands — carries elevated calcium and magnesium concentrations. Over time, these minerals attack the rubber inner liner of braided hoses, causing it to swell and crack even when the outer mesh looks fine. A hose that appears intact on the outside can already be weeping at the ferrule, damaging the cabinet floor and sub-structure without any visible sign until the damage is done.
Holiday rentals and hotels face compounded risk: supply hoses are pressurised 24 hours a day, year-round, and seldom inspected between guest stays. A burst hose discovered on a Monday morning by a cleaner can mean replacing flooring, cabinetry, and potentially dealing with a neighbour's water damage claim. Replacing hoses every five to seven years — or whenever you spot surface rust, kinking, or any moisture at the connection points — is cheap insurance.
What to Buy Before You Start
Modern braided supply hoses consist of a reinforced stainless-steel mesh jacket over a flexible polymer core, fitted with swivel nuts at each end. For a standard kitchen tap you need two hoses — one for hot, one for cold. Measure the existing hoses from fitting centre to fitting centre, then buy hoses 5–10 cm longer than that measurement; the slight slack prevents stress on the ferrules when the tap flexes. Standard connections in Greek kitchens are almost universally 3/8-inch compression on the valve end and 1/2-inch or M10 on the tap tail, but confirm your sizes before purchasing.
Pick up a small roll of PTFE (Teflon) thread tape, a basin wrench if the tap is set deep into the cabinet, an adjustable spanner, and a shallow tray or thick towel to catch residual water. The entire job requires no specialist plumbing skills and no soldering.
How to Replace Kitchen Sink Supply Hoses: Step by Step
- 1
Shut off the water and relieve pressure
Turn the shut-off valves beneath the sink clockwise until they stop — one for hot, one for cold. If there are no under-sink valves, turn off the mains stopcock for the kitchen circuit. Open the kitchen tap fully and let it run until no more water flows; this drains residual pressure from the line and reduces spills when you disconnect the hoses.
- 2
Disconnect the old hoses
Place a shallow tray or folded towel directly under the connections. Using an adjustable spanner, hold the shut-off valve body steady with one hand and turn the swivel nut on the hose counterclockwise with the other — always counter-hold to avoid stressing the valve. Once the bottom nut is loose, move to the tap tail above and unscrew that swivel nut in the same way. Some water will escape; that is expected. Remove both hoses and inspect the valve threads for corrosion or scale buildup before proceeding.
- 3
Clean the valve and tap tail threads
Use a stiff nylon brush or an old toothbrush to remove any mineral deposits from the valve outlet threads and the tap tail. Wipe both clean and dry. This is the step most DIYers skip, and it is the reason fittings leak after reassembly. If you see heavy pitting or cracking on the valve body itself, call a plumber before continuing — a corroded valve will not seal reliably even with new hoses.
- 4
Wrap threads and fit the new hoses
Wrap 2–3 layers of PTFE tape clockwise around the male threads on both the shut-off valve outlet and the tap tail. Hand-thread the new hose swivel nuts onto each connection, starting at the tap tail because it is harder to reach. Snug the nuts down by hand until you feel resistance, then tighten with a spanner — typically one-quarter to one-half turn past hand-tight. Do not overtighten; braided hose fittings have a rubber or nylon washer inside the swivel nut that provides the seal, and crushing it causes leaks.
- 5
Restore water and inspect for leaks
Slowly reopen the shut-off valves — one full turn, pause, then fully open. Watch every connection point for 60 seconds without touching anything. Run the tap on both hot and cold to cycle the full system, then check again with a dry paper towel pressed against each fitting; even a tiny weep will show as moisture. If you find a leak, close the valve, gently snug the relevant nut one-eighth of a turn more, and retest. Mark the installation date on the hoses with a marker pen so you know when the next replacement is due.
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FAQ
- How often should supply hoses be replaced in Greece?
- Every five to seven years is the general recommendation, but Greece's hard water shortens that window. Inspect the hoses annually — look for kinking, surface rust on the mesh, any discolouration of the cabinet floor, or moisture at the ferrule ends. Replace immediately at the first sign of any of these, regardless of age.
- Can I replace supply hoses myself or do I need a licensed plumber?
- Replacing braided supply hoses is one of the few plumbing jobs homeowners and property managers can confidently handle without a licensed plumber, provided the shut-off valves are functional and the tap tail threads are in good condition. If the shut-off valves themselves are stiff, corroded, or non-functional, you will need to isolate the mains supply first — at that point, involving a plumber to also service or replace the valve is worthwhile.
- What length and size of hose do I need for a standard Greek kitchen tap?
- Most kitchen sink connections in Greece use a 3/8-inch compression fitting at the valve end and either a 1/2-inch BSP or M10 male thread on the tap tail. Measure the straight-line distance from valve outlet to tap tail, then buy hoses 5–10 cm longer to allow a gentle curve without stress. Standard lengths of 30 cm, 40 cm, and 50 cm cover the vast majority of under-sink configurations and are available at any Greek plumbing supplier (υδραυλικά).