Monument
Monument 1377W Drain Testing Plug 75mm (3in) 1377W
Model 1377W
Best price
Lowest we’ve seenWhere to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked 23 hours ago | £11.17 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £13.50 | In stock | Visit Blueperry Tool & Builders Merchants (UK) (opens in a new tab) |
 checked within the hour | £14.95£16.93 | In stock | Visit Tooled Up (opens in a new tab) |
Prices exclude delivery. We may earn a commission if you buy through these links, which never affects the ranking above — it is always cheapest first.
Price history
Full price historyThis is the lowest price we have recorded. If you were waiting for a drop, this is it.
About this product
The Monument 1377W is a 75mm (3in) drain testing plug suited to standard domestic and light commercial drainage pipework, used for pressure testing, repair and replacement work on waste pipes. Made from durable, flexible material, it has removable top caps and rubber rings for easy cleaning and maintenance. A wing nut knob is turned to depress the rubber cone, expanding it to form a watertight seal against the pipe wall, without the need for extra tools. The plug is capable of sealing against pressures of up to 2.24 bar (33 psi), making it suitable for typical drain testing tasks.
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