Description
A half-inch tank link
Make a connection between suitable water butts with 13mm corrugated hose and two straight tank fittings.
Choose 1m to 5m of hose. Each kit includes two ½-inch BSP male connectors, back nuts and washers.
Water butts, hose clips, tools and extra sealing materials are separate.
One fitting at each end
This photograph shows one connector with its nut and washer removed. Two connectors are supplied, giving each tank its own mounting point and hose barb.
The male threaded stem mounts at the tank wall. The narrow ribbed hosetail fits inside the nominal 13mm hose. ½-inch BSP is a thread designation; it is not the diameter of a hole to drill or a measurement of the pipe outside.
The nut and washer hold and seal the fitting at a suitable tank wall. They do not secure the hose to its barb. Choose separate clips using the outside diameter of the hose after it is fitted.
12-20mm worm-drive hose clips are one option where that measured outside diameter falls within their range. Check current availability and the fit before ordering.
Plan a supported connection
Check the mounting points and measure the pipe route before choosing your kit.
Measure fitting to fitting
Follow the full route of the hose, allowing for gentle bends and the pipe pushed onto each barb. A 1m hose does not necessarily span a 1m gap between tank walls. Only the supplied hose length changes between options.
Check the mounting areas
Use suitable washer seating surfaces and make sure the retaining nuts can be reached inside. Inspect wall thickness and existing openings against the actual fittings. A threaded outlet must match the ½-inch BSP male connection.
Support, fill and inspect
Keep pipe weight and movement off the fittings, avoid sharp bends and check both tank-wall seals and hose joints with water. Maintain appropriate overflow provision when the tanks fill; a pump, valve or automatic controller is not included.
Questions before ordering
Does a longer kit contain more fittings?
No. The 1m, 2m, 3m, 4m and 5m options contain the same two straight ½-inch BSP male to 13mm barbed fittings, with their nuts and washers. Only the supplied hose length changes. Choose it for your measured route, including bends and the pipe on the barbs.
Are a hole saw and hose clips included?
No. This kit contains hose and two tank connectors with mounting parts. Choose suitable tools separately if you need to prepare openings, and select clips for the actual outside diameter of the hose fitted over the barb. Check the actual connector and tank wall before cutting.
Why is the hose described as 13mm and half-inch?
13mm is the nominal internal diameter used for this hose size. The connector's tank thread is ½-inch BSP, which is a separate plumbing thread designation. Do not use an inch-to-millimetre conversion to choose the tank opening or a clip for the hose outside.
Is smooth-bore hose completely flat inside?
No. This corrugated PVC pipe has smoothed internal ridges rather than a completely flat inner wall. Keep the route in gentle curves and avoid pinching the pipe at a bend or overtightening a securing clip. Support the hose so it does not pull on either tank fitting.
Product information & technical details
| SKU | WB12LINK-001M |
|---|---|
| Product type | |
| Length | 1m, 2m, 3m, 4m, 5m |
| Internal diameter | 13mm (1/2") |
| BSP thread size | 1/2" |
| Thread gender | Male |
| Barb size | 13mm (1/2") |
| Kit parts | Corrugated hose in selected length, 2 straight tank connectors, Back nuts and washers |
|---|---|
| Colour | Black |
| Material | Plastic |
| Straight tank fittings | 2 × ½-inch BSP male to 13mm hose barb |
| Tank mounting | Back nut and washer for each fitting |
| Hose material | Flexible PVC |
| Hose bore profile | Smoothed internal ridges; not completely flat |
What is BSP?
What is BSP thread size?
BSP (British Standard Pipe) is a nominal pipe-thread size, not a direct measurement of a fitting’s bore or outside diameter. For example, a ½-inch BSP male thread measures about 21mm across its outer thread crests.
These figures are approximate outside diameters of male BSP threads, to help identify the nominal size. They are not inch-to-millimetre unit conversions:
- 3/8" BSP → 16.66 mm
- 1/2" BSP → 20.95 mm
- 3/4" BSP → 26.44 mm
- 1" BSP → 33.25 mm
- 1.25" BSP → 41.91 mm
- 1.5" BSP → 47.80 mm
- 2" BSP → 59.61 mm
- 3" BSP → 87.88 mm
- 4" BSP → 113.03 mm
All our BSP threads are parallel (BSPP, to ISO 228), not tapered.
Measure across the outside of a male thread, then check its pitch and whether it is parallel or tapered. Diameter alone does not confirm compatibility. Check the product’s stated thread specification before connecting.
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.