Description
Your tank. Your connection.
A brass tank adapter and plastic inline valve, with an outlet chosen to suit your watering setup.
From hose barbs to MDPE and quick couplings, choose the connection you already use.
One selected kit supplied, with PTFE tape.
The same tank connection in every kit
The brass mounting adapter has a 1-inch BSP male external thread and a ¾-inch BSP female internal thread. It is supplied with a back nut and two washers. The black plastic valve has ¾-inch BSP male inlet and outlet threads and a rotary on/off control.
Every option includes this adapter, valve and one PTFE tape roll. Valve Only, shown here, leaves the valve’s male outlet thread exposed. The other options add the selected outlet fitting.
An existing tank connection must match the adapter’s thread. For a new mounting point, check the actual fitting, tank wall thickness, washer seating and access to the back nut before drilling. BSP names do not give the hole diameter.
Which outlet should you choose?
Match the connection type first, then check how its size is measured.
Valve Only
The valve’s outlet remains a bare ¾-inch BSP male thread. Choose this if you already have a compatible female-threaded fitting. It is an open threaded outlet, not a blanking cap.
Plastic irrigation barbs
Choose ½-inch Barb or ¾-inch Barb to match the hose bore. The ½-inch version uses the fitting also called 16mm irrigation: it fits approximately 13mm internal / 16mm external diameter hose.
Brass hose barbs
The ½-inch Brass Barb is for approximately 13mm internal diameter hose; the ¾-inch Brass Barb is for approximately 19mm internal diameter hose. Check hose material and a suitable securing method.
4mm micro tube
The 4mm Micro Barb option gives a small barbed outlet for compatible micro-irrigation tube. Check the tube’s internal fit rather than selecting it by its outside diameter alone.
20mm MDPE pipe
The 20mm MDPE Joiner has a compression connection for 20mm outside diameter MDPE pipe. It is a different connection from a hose barb, despite also using a millimetre size.
Quick connectors and GEKA
Male Quick Connector supplies a projecting click-in nipple; Female Quick Connector supplies the blue receiving socket. GEKA supplies a claw coupling. Each needs the appropriate matching connector, supplied separately.
Leave room for the valve and pipework
Check the whole assembly’s position before tightening the mounting fitting.
Reach the fixing
Make sure the back nut can be fitted and the washers can sit properly against a suitable tank wall. Check an existing outlet’s actual thread before ordering.
Support the connection
Leave room to turn the control and connect the chosen hose, pipe or coupling. Support pipework so its weight does not pull against the tank fitting.
Check with water
Inspect the tank-wall seal and threaded joints after assembly and again when the tank is filled. No pressure rating or drinking-water approval is specified for this complete kit.
Questions about these valve kits
Does one kit include every outlet fitting?
No. The outlet choices are separate kit variants. Each includes one brass tank adapter with its back nut and two washers, one inline valve and one PTFE tape roll. Options other than Valve Only add the selected outlet fitting. Hose, pipe and any matching coupling half are not included.
Why is a ½-inch barb also called 16mm irrigation?
They describe different measurements of the hose it fits. The 16mm irrigation designation refers to the hose’s outside diameter; the corresponding bore is approximately 13mm, or ½ inch. This plastic barb fits that internal bore. Do not treat the 16mm name as a requirement for 16mm internal diameter hose.
Is the 20mm MDPE option the same as a ¾-inch hose barb?
No. The MDPE connector uses a compression fitting for pipe with a 20mm outside diameter. A ¾-inch hose barb is chosen to fit the hose’s approximately 19mm internal bore. These are different connection systems and measurement conventions, so check your pipe or hose before choosing the option.
Can I attach either quick connector to any garden hose?
Check the connector already on your hose. The Male Quick Connector option has a projecting nipple that needs a matching receiving connector. The Female Quick Connector option has a blue receiving socket that needs a matching male nipple. Neither option is a bare-hose barb; the matching half is separate.
Product information & technical details
| SKU | WB34-BRASS-KIT-011+ |
|---|---|
| Product type | |
| BSP thread size | 3/4", 1" |
| Thread gender | Male, Female |
| Barb size | 13mm (1/2"), 19mm (3/4"), 4mm |
| MDPE size | 20mm |
| Kit parts | Brass Tank Adapter, Plastic Inline Valve, PTFE Tape, Selected Outlet Fitting (where chosen) |
| Colour | Brass, Black |
| Material | Brass, Plastic |
|---|---|
| Adapter threads | 1-inch BSP male / ¾-inch BSP female |
| Valve threads | ¾-inch BSP male at both ends |
| Adapter mounting parts | Back nut and two washers |
| Supply quantity | 1 selected kit; not all outlet options |
| PTFE tape | 1 roll per kit |
| Irrigation sizing example | 13mm internal / 16mm external diameter hose fits the ½-inch plastic barb |
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.