Description
A straight adapter for your 40mm hose run
Join suitable 40mm pond hose to equipment with a matching 1¼-inch BSP female port.
The single-size ribbed hosetail and external male thread give you two distinct connections to check when choosing the fitting.
One black plastic adapter supplied. Hose, clips and sealing accessories are separate.
Check the size at each end
The hose connection is for a suitable 40mm internal bore. Check that metric size when comparing hoses: the separate 38mm range may also be called 1½-inch.
The equipment connection is 1¼-inch BSP male, with an external thread reference of approximately 41.91mm. The dimension photograph shows the 80mm overall length and 50mm hosetail section in two views of one adapter.
Give the fitting room to work
Plan the hose, clip and equipment connection together.
Match the BSP port
Confirm a 1¼-inch BSP female port before assembly. Follow its sealing method and tightening guidance for plastic fittings. The hex shoulder is part of the adapter body; it is not an independent swivel collar.
Check hose and clip fit
Choose suitable 40mm-bore hose and check its wall profile against the hosetail. Select a securing clip for the hose’s fitted outside diameter. Hose and clips are sold separately from this bare adapter.
Support a gradual bend
Leave room beyond the hosetail for the hose to curve gently. Support the run without twisting or pulling on the port, keep both joints accessible and inspect the completed assembly with water before concealing it.
Questions about the 40mm adapter
Will a hose labelled 1½-inch fit this adapter?
Check the metric internal bore. Both 38mm and 40mm pond hoses can carry a nominal 1½-inch trade label, but they are separate sizes in this range. This adapter is intended for suitable 40mm-bore hose. Match the hose bore and wall profile to the hosetail; an inch label alone is not enough to establish the fit.
Why does a 40mm hosetail have a 1¼-inch thread?
The hose end and the equipment end are separate connection specifications. This version combines a 40mm hosetail with a nominal 1¼-inch BSP male thread, shown at approximately 41.91mm externally. It needs a matching 1¼-inch BSP female port. Choose the hose bore and the BSP thread independently when matching a pump, filter or other fitting.
Does the adapter include the hose clip?
No. This listing supplies one bare black plastic adapter. Choose the hose and clip separately, checking the hose’s construction and the outside diameter once it is seated on the barb. A clip’s size relates to the outside of the fitted hose, not simply its 40mm internal bore. Follow the hose and clip instructions when securing the joint.
Is 80mm enough space for the complete connection?
The 80mm dimension is the adapter’s overall length, including its 50mm hosetail section. The finished installation also needs room for thread engagement, hose seating, a securing clip and a broad hose bend. Plan the full route and keep the joints accessible. Support the hose so its weight and sideways pull do not load the plastic equipment connection.
Product information & technical details
| SKU | POND40B125BSPMSTR001 |
|---|---|
| Product type | |
| BSP thread size | 1.25" |
| Thread gender | Male |
| Barb size | 40mm (1.5") |
| Colour | Black |
| Material | Plastic |
|---|---|
| Connection layout | Straight 40mm hosetail to 1¼-inch BSP male thread |
| Overall length | 80mm |
| Hosetail section length | 50mm |
| External thread diameter | Approximately 41.91mm; nominal 1¼-inch BSP |
| Contents | One adapter; hose, clips and equipment not included |
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.