Steel Expanding Pipe Stoppers for Purging and Pipe Blocking - 1.5" to 42"
- Steel expandable pipe stoppers for purging and temporary pipe blocking applications
- Wing nut compresses rubber tyre between two plates to create seal within pipe
- Complies with British Standards BS8005 for low pressure testing and pipe sealing
- Suitable for prolonged water immersion, elevated temperatures, and acidic or alkaline environments

Steel Expanding Pipe Stoppers – 1.5″ to 42″
Expandable test plugs designed for purging and general pipe blocking applications. Pipe stoppers, also known as drain plugs, are utilized to temporarily seal pipe ends or openings for various testing purposes.
These pipe stoppers primarily seal newly installed pipes and pipework systems under repair from water, gases, and foreign objects. The pipe stopper range offers multiple styles to accommodate different applications, with pipe sizes ranging from ½” to 72″. Specialized pipe stoppers for pressure testing are also available.
Operating Mechanism
The design features a central spindle or shaft fitted with two plates and a natural rubber tire (ring) positioned between them. A wing nut on the shaft moves the plates together, compressing the tire to create a seal within the pipe.
These stoppers are available with hollow shaft versions for standard hose connections or use with fixed or free nipple caps.
Expandable pipe stoppers are manufactured in three material types: nylon, aluminium, and steel.
Steel Plugs
Steel plugs are designed for demanding applications including prolonged water immersion, elevated temperature exposure, or contact with acidic or alkaline environments where nylon and aluminium plugs may prove unsuitable.
All plugs comply with British Standards BS8005 for low pressure testing and pipe sealing requirements.
These plugs are designed for demanding applications including prolonged water immersion, elevated temperature exposure, or contact with acidic or alkaline environments where nylon and aluminium plugs may prove unsuitable.
(Larger sizes available upon request – contact us for more information)
Datasheet
| PART NO. | PIPE SIZE | INTERNAL NOMINAL DIAMETER | PIPE SIZE (MM) | WILL FIT PIPES WITH INTERNAL DIAMETER | MINIMUM INSERTION INTO PIPE | OVERALL LENGTH | DIAMETER OF WATERWAY | MAXIMUM ALLOWABLE BACK PRESSURE | WEIGHT (LBS.) | WEIGHT (KG) |
| SES1.5 | 1½” | 40 mm | 1.45 – 1.96″ | 37 – 50 mm | 31 mm | 81.5 mm | ½” | 30 psi | 1 lbs. | 0.16 kg |
| SES2 | 2″ | 50 mm | 1.96 – 2.40″ | 50 – 61 mm | 32.7 mm | 82.8 mm | ½” | 30 psi | 1 lbs. | 0.18 kg |
| SES2.5 | 2½” | 65 mm | 2.40 – 2.95″ | 61 – 75 mm | 33.2 mm | 80.5 mm | ½” | 30 psi | 1 lbs. | 0.26 kg |
| SES3 | 3″ | 75 mm | 2.87 – 3.34″ | 73 – 85 mm | 34 mm | 80.5 mm | ½” | 20 psi | 1 lbs. | 0.28 kg |
| SES3.5 | 3½” | 89 mm | 3.30 – 3.93″ | 84 – 100 mm | 41 mm | 81 mm | ½” | 15 psi | 1 lbs. | 0.36 kg |
| SES4 | 4″ | 100 mm | 3.70 – 4.25″ | 94 – 108 mm | 37.5 mm | 83.3 mm | ½” | 10 psi | 1 lbs. | 0.41 kg |
| SES4.5 | 4½” | 114 mm | 4.33 – 4.92″ | 110 – 125 mm | 40 mm | 83.3 mm | ½” | 10 psi | 1 lbs. | 0.58 kg |
| SES5 | 5″ | 125 mm | 4.88 – 5.47″ | 124 – 139 mm | 37 mm | 83.3 mm | ½” | 10 psi | 1 lbs. | 0.60 kg |
| SES6 | 6″ | 150 mm | 5.90 – 6.29″ | 150 – 160 mm | 39.7 mm | 83.3 mm | ½” | 10 psi | 2 lbs. | 0.75 kg |
| SES7 | 7″ | 175 mm | 6.88 – 7.87″ | 175 – 200 mm | 46 mm | 130 mm | 1″ | 7 psi | 3 lbs. | 1.56 kg |
| SES8 | 8″ | 200 mm | 7.67 – 8.46″ | 195 – 215 mm | 37 mm | 130 mm | 1″ | 7 psi | 3 lbs. | 1.47 kg |
| SES9 | 9″ | 225 mm | 8.26 – 9.05″ | 210 – 230 mm | 58 mm | 150 mm | 1″ | 7 psi | 4 lbs. | 1.93 kg |
| SES10 | 10″ | 250 mm | 9.64 – 10.23″ | 245 – 260 mm | 55 mm | 150 mm | 1″ | 7 psi | 6 lbs. | 2.55 kg |
| SES12 | 12″ | 300 mm | 11.65 – 12.59″ | 296 – 320 mm | 85 mm | 150 mm | 1″ | 7 psi | 8 lbs. | 3.72 kg |
| SES14 | 14″ | 350 mm | 13.38 – 15.15″ | 340 – 385 mm | 85 mm | 210 mm | 1″ | 5 psi | 14 lbs. | 6.54 kg |
| SES15 | 15″ | 375 mm | 14.56 – 16.33″ | 370 – 415 mm | 100 mm | 210 mm | 1″ | 5 psi | 15 lbs. | 7.00 kg |
| SES16 | 16″ | 400 mm | 15.35 – 16.92″ | 390 – 430 mm | 95 mm | 210 mm | 1″ | 5 psi | 19 lbs. | 8.45 kg |
| SES18 | 18″ | 450 mm | 17.63 – 19.48″ | 448 – 495 mm | 100 mm | 220 mm | 1″ | 5 psi | 23 lbs. | 10.6 kg |
| SES20 | 20″ | 500 mm | 19.29 – 20.86″ | 490 – 530 mm | 95 mm | 126 mm | 2″ | 5 psi | 23 lbs. | 10.38 kg |
| SES21 | 21″ | 525 mm | 20.27 – 21.85″ | 515 – 555 mm | 95 mm | 126 mm | 2″ | 3 psi | 25 lbs. | 11.28 kg |
| SES24 | 24″ | 600 mm | 23.22 – 24.80″ | 590 – 630 mm | 95 mm | 126 mm | 2″ | 3 psi | 34 lbs. | 15.57 kg |
| SES28 | 28″ | 700 mm | 27.16 – 28.74″ | 690 – 730 mm | 95 mm | 126 mm | 2″ | 3 psi | 44 lbs. | 19.90 kg |
| SES30 | 30″ | 750 mm | 29.13 – 30.70″ | 740 – 780 mm | 95 mm | 126 mm | 2″ | 3 psi | 55 lbs. | 25.09 kg |
| SES32 | 32″ | 800 mm | 31.10 – 32.67″ | 790 – 830 mm | 95 mm | 125 mm | 2″ | 3 psi | 64 lbs. | 28.90 kg |
| SES36 | 36″ | 900 mm | 35.03 – 36.61″ | 890 – 930 mm | 95 mm | 126 mm | 2″ | 3 psi | 77 lbs. | 35.08 kg |
| Brand | Welding & Welder |
| Size | 1.5" · |
| SKU | Size | Stock Status | |
|---|---|---|---|
| SS1.5 | 1 5 | In Stock | £7.52 ex VAT £9.02 inc VAT |
| SS2.5 | 2 5 | In Stock | £7.52 ex VAT £9.02 inc VAT |
| SS2 | 2 | In Stock | £7.52 ex VAT £9.02 inc VAT |
| SS3 | 3 | In Stock | £7.62 ex VAT £9.14 inc VAT |
| SS4.5 | 4 5 | In Stock | £18.44 ex VAT £22.13 inc VAT |
| SS4 | 4 | In Stock | £7.52 ex VAT £9.02 inc VAT |
| SS5 | 5 | In Stock | £15.82 ex VAT £18.98 inc VAT |
| SS6 | 6 | In Stock | £15.82 ex VAT £18.98 inc VAT |
| SS8 | 8 | In Stock | £26.20 ex VAT £31.44 inc VAT |
| SS10 | 10 | In Stock | £35.34 ex VAT £42.41 inc VAT |
| SS12 | 12 | In Stock | £47.94 ex VAT £57.53 inc VAT |
| SS14 | 14 | In Stock | £116.86 ex VAT £140.23 inc VAT |
| SS24 | 24 multilock | In Stock | £231.00 ex VAT £277.20 inc VAT |
| SES28 | 28 multilock | In Stock | £322.00 ex VAT £386.40 inc VAT |
| SS30 | 30 multilock | In Stock | £426.81 ex VAT £512.17 inc VAT |
| SES32 | 32 multilock | In Stock | Price On Application |
| SS16 | 16 | In Stock | £132.42 ex VAT £158.90 inc VAT |
| SS18 | 18 | In Stock | £255.36 ex VAT £306.43 inc VAT |
| SES36 | 36 multilock | In Stock | Price On Application |
| SS20 | 20 multilock | In Stock | £200.00 ex VAT £240.00 inc VAT |
| SS42 | 42 multilock | In Stock | Price On Application |
Download Datasheet
Download PDFA carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.
Steel Expanding Pipe Stoppers for Purging and Pipe Blocking - 1.5" to 42" Get in touch
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The Millfields
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