Plumbing & drainage inspections · Portugal
Plumbing and drainage inspections in Portugal
Where the water comes from and where it goes are two of the questions foreign buyers ask last and worry about most — particularly outside the towns.
Why it matters
Mains services are an assumption, not a given
If every property you have owned was connected to a public water supply and a public sewer, it is easy to assume the same here. Outside the towns that assumption often does not hold.
A rural Portuguese property may take its water from a borehole or a spring rather than a mains connection, and may discharge to a fossa séptica — a septic tank — rather than to a sewer. Both are entirely normal. Both come with obligations and running costs that a mains connection does not.
The trouble is that none of it is visible on a viewing, and an agent may not know. A tap runs and a toilet flushes whether the water came from the mains supply or a hole in the ground.
Drainage
Fossa séptica, explained
A fossa séptica is a tank, usually below ground, that receives the property’s waste. Solids settle, liquid discharges to a soakaway or drainage field, and the tank is emptied periodically by tanker.
It works perfectly well when it is correctly sized, properly built and regularly emptied. It works badly when it is undersized for the number of people using it, when the soakaway has silted up or was never adequate, or when it has not been emptied for years because the owner was never told it needed doing.
What that means for a buyer is a set of questions worth asking before completion. Where is it? How big is it? When was it last emptied, and by whom? Where does the outflow go? Is there any sign of surface water or odour where the soakaway should be? A tank in poor condition is not a disaster, but replacing one is not a small job either, and it is better in the budget than a surprise.
Supply
Mains, borehole and spring
Water may arrive from a public supply, from a borehole on the property, from a shared spring or from a combination with a storage tank between them.
Each raises different questions. A mains supply is the simplest. A borehole means a pump, a pressure vessel and an electricity cost, and it means the supply depends on a water table that can fall in a dry summer. A shared spring means an arrangement with neighbours that may or may not be written down anywhere.
Storage tanks are common with all three, and their condition matters — an open or poorly covered tank is a contamination route into a system you will be drinking from.
What we look at
Assessing the systems
What can usefully be assessed depends on the property, what is accessible and what is in use on the day, so the scope is agreed when we quote.
Supply and pipework
The incoming supply arrangement, visible pipework and its material, storage tanks and pumps where present, and pressure at the outlets.
Drainage runs
Visible drainage, inspection chambers where they can be opened, falls, and whether the discharge arrangement is what the property is said to have.
Fittings and appliances
Accessible sanitary fittings, hot water provision and connections, checked for condition and obvious leakage.
Fossa and soakaway
The tank and its surroundings where they can be located and safely accessed, and any surface evidence that the system is not coping.
Be clear about this
What we do not do
We assess what is accessible and visible. We do not excavate, we do not empty tanks, and we do not enter confined spaces.
Water quality is a laboratory question. A borehole or spring supply used for drinking should be tested by an accredited laboratory, and a chemical screen on site is not a substitute for that. Where a supply is private, we say so and recommend the test rather than offer an opinion on the water.
Where the evidence suggests a problem that cannot be settled from the surface — a blocked run, a collapsed pipe, a soakaway that has failed — we say what further investigation would establish it.
FAQ
Frequently asked questions
Should a fossa séptica put me off a property?
No. A great many perfectly good Portuguese properties have one. What matters is its condition, its size relative to how you will use the house, and whether the soakaway works. Those are answerable questions.
Can you test the drinking water?
A private supply used for drinking should be tested by an accredited laboratory. We will tell you that the supply is private and recommend the test; we do not offer a laboratory opinion ourselves.
Is this included in a pre-purchase inspection?
Accessible plumbing and drainage can be included in a pre-purchase inspection, with the scope confirmed in your quotation. A dedicated assessment may suit a specific concern, which is common on rural property.
What if the fossa cannot be found?
It happens, particularly where it has not needed emptying recently. We record that it could not be located and what that means — which is itself worth knowing before you own it.
Find out where the water comes from and where it goes
Send the property address or listing, and tell us whether the supply or the drainage is your main concern. We will provide a quotation.