Description
A straight connection from tank to hose
Choose the fitting for your tank and hose from six male BSP sizes, 1/2-inch to 2-inch. Each black plastic connector has a straight-through body and a barbed hosetail, with a retaining nut and one sealing washer.
Suitable mounting surfaces, access inside the tank and the hose fit all matter. Check those details for your installation before choosing the size.
One selected fitting supplied with its nut and washer. Hose and installation tools are separate.
Three parts with different jobs
The connector body brings the male BSP thread and the barbed hose end together in one straight fitting.
The retaining nut secures the fitting through a suitable tank wall. Check that there is room to reach and tighten it, and that the wall thickness suits the available thread.
The sealing washer provides the seal at the tank mounting surface. The actual 3/4-inch parts are shown here; shape and proportions vary with your selected size. This is one fitting, not a pair or a complete hose-linking kit.
Choose the thread and hosetail together
Each option pairs the BSP thread with a hosetail of the same nominal inch size.
| Tank thread | Hose-end designation |
|---|---|
| 1/2-inch BSP | 1/2-inch hosetail |
| 3/4-inch BSP | 3/4-inch hosetail |
| 1-inch BSP | 1-inch hosetail |
| 1.25-inch BSP | 1.25-inch hosetail |
| 1.5-inch BSP | 1.5-inch hosetail |
| 2-inch BSP | 2-inch hosetail |
These are connection designations, not drilling measurements. Check the actual fitting against the hose, tank wall and intended opening before cutting or assembly. The BSP size does not establish compatibility with every water butt or IBC outlet.
Plan the mounting before drilling
A suitable surface and access to the retaining nut are as important as the connection size.
- Check the tank wall, sealing surface and available thread before deciding on the opening.
- Use the actual connector to verify the required hole; do not drill from the BSP label alone.
- Check the hose fit, select any clips for the actual assembly and support the hose so it does not pull on the outlet.
- Water-test the tank seal and hose connection before leaving the installation in use.
Check before you order
How many fittings and washers do I receive?
One selected fitting, one retaining nut and one sealing washer. Hose, clips, tanks and drilling tools are separate.
Is the BSP size the hole size I should drill?
No. BSP identifies the thread. Check the required opening against the actual fitting, allowing for the tank wall, sealing surface and retaining nut, before cutting.
Will it fit any water butt or IBC connection?
Check your particular connection and mounting first. These are male BSP-to-hosetail fittings, not universal tank adapters. Match the thread, hose and mounting arrangement rather than relying on the tank type alone.
Can I use it to link two water butts?
A link needs a suitable fitting at each tank, compatible hose and appropriate securing hardware. This listing supplies one fitting with its nut and washer; it does not include the second fitting or connecting hose.
Product information & technical details
| SKU | BUTT12BSPM-12B001[#ML] |
|---|---|
| Product type | |
| BSP thread size | 1/2", 3/4", 1", 1.25", 1.5", 2" |
| Thread gender | Male |
| Barb size | 12.7mm (1/2"), 19mm (3/4"), 25mm (1"), 32mm (1.25"), 38mm (1.5"), 50mm (2") |
| Colour | Black |
| Material | Plastic |
|---|---|
| Available options | Size, colour and connection lists show available options across this range. One selected variant is supplied; select the required combination. |
| Configuration | Straight male BSP-to-barbed hosetail fitting |
| Supplied parts | 1 connector body, 1 retaining nut and 1 sealing washer |
| Pack quantity | 1 fitting in the selected size |
| Not included | Hose, clips, tanks and drilling tools |
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.