Description
Put a shut-off valve at your water butt
A ¾-inch BSP tank connector and separate irrigation valve create a controlled outlet for a compatible barbed pipe connection.
The valve screws onto the connector. Its hosetail accepts the familiar 13/16mm irrigation pipe sizing: nominal 13mm inside and 16mm outside.
One connector and valve kit supplied. Pipe and installation accessories are separate.
Two parts with a threaded joint
The tank connector has ¾-inch BSP male threads at both ends. The valve’s ¾-inch BSP female collar screws onto the exposed connector thread, leaving its barbed end ready for the pipe.
The valve is a separate component, rather than a mechanism moulded into the tank fitting. The supplied connector has its own nut and washer for mounting. This kit does not contain a Standard/Extended adapter pair or an additional loose hosetail.
Check an existing outlet’s size and gender first. For an unthreaded mounting, confirm the tank wall is suitable, the washer can seat flat and you can reach the nut. Plan the opening from the fitting’s requirements, not from the nominal BSP size.
What does 13/16mm mean here?
Match the pipe bore as well as its outside diameter.
13mm inside
The nominal ½-inch hose bore is commonly rounded to 13mm. It is the inside of the compatible pipe that fits over the barbed tail.
16mm outside
Irrigation pipe is often sold as 16mm by its outside diameter. The combined 13/16mm description distinguishes the inside and outside sizes; it does not describe two different valve options.
Check your pipe
LDPE and porous pipe labels vary. Check the actual bore, outside size and suitability for a barbed connection. Secure and support the pipe appropriately; do not rely on the product name alone to establish a fit.
Keep the control within reach
Position the installation so you can operate the valve without the pipe pulling on the tank fitting. The hosetail is a direct pipe-on-barb connection, not a click-on garden-hose nipple.
Use a suitable clip where needed for your pipe, and support the run rather than hanging its weight from the connector. After assembly, test the tank mounting, connector-to-valve joint and pipe connection with water.
One tank connector with nut and washer and one barbed valve are supplied. Pipe, clips, PTFE tape and tools are separate. A valve controls the outlet; it does not create extra water pressure for an irrigation system.
Questions about this irrigation outlet
Is the valve built into the tank connector?
No. The kit contains a separate male-to-male tank connector and an irrigation valve with a female threaded collar. The valve screws onto one of the connector’s ¾-inch BSP male ends. The connector includes its mounting nut and washer. There is no separate Extended adapter in this kit, and the hose barb is part of the valve.
Does 16mm mean a 16mm internal hose diameter?
No. In this irrigation sizing convention, 16mm refers to the pipe’s outside diameter. The matching nominal ½-inch inside diameter is commonly rounded to 13mm, giving the familiar 13/16mm description. Check both dimensions and the pipe’s suitability for a barbed fitting before ordering; a pipe with a 16mm bore is a different size.
Can I clip a garden-hose connector onto it?
The outlet is a tapered hose barb for a direct connection to compatible pipe. It is not a male click-on nipple, so a female garden-hose quick connector will not clip straight onto it. Select the pipe by its internal diameter and fitting suitability, secure it appropriately and support the run so it does not pull against the tank mounting.
Will this make a gravity-fed watering system work?
The valve lets you start or stop water at the outlet, but it does not add pressure. Whether a gravity-fed setup works depends on the tank height, pipe run and the pressure or head needed by the porous hose, drippers or other equipment. Check those requirements for your watering system, then test the assembled connections before leaving it in use.
Product information & technical details
| SKU | BUTT34+VALVE16B34BSPF |
|---|---|
| Product type | |
| BSP thread size | 3/4" |
| Thread gender | Male, Female |
| Barb size | 13mm (1/2") |
| Kit parts | Plastic Male-to-male Tank Connector, Separate Irrigation Valve, Integral Half-inch Hose Barb, Nut, Washer |
| Colour | Black |
| Material | Plastic |
|---|---|
| Tank connector | Plastic ¾-inch BSP male-to-male tank fitting with nut and washer |
| Valve thread | ¾-inch BSP female; screws onto the tank connector |
| Pipe connection | Integral barb for nominal ½-inch / 13mm internal-diameter hose, commonly 13/16mm irrigation pipe |
| Control | Separate plastic irrigation valve with turn-operated on/off handle |
| Kit contents | 1 tank connector with nut and washer; 1 barbed irrigation valve |
| Connection style | Threaded connector-to-valve joint; direct pipe-on-barb hose connection |
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.