WC-F18R vs WC-F26R flexible pan connector selection comes down to measured reach, not which fitting looks easier to stretch into place. McAlpine identifies the WC-F18R as the shorter 100–160mm model and the WC-F26R as the longer 170–410mm model. Measure between the pan spigot and the prepared soil-pipe entry, then choose the exact model whose stated range and route suit the installation.
Both products are straight flexible WC connectors, so this is not a straight-versus-angled decision. It is a short-versus-long reach check for a route that can be made without a forced bend, a trapped fitting or a pan pushed out of position. For other layouts, browse APM’s pan connectors and wider plumbing fittings ranges before finalising the job list.
Use the exact McAlpine model on the order. The product photographs help identify the two lengths, but the site measurement and model reference should control the choice.
The shorter model for a measured pan-to-soil route within its 100–160mm adjustment range. It keeps excess flexible body out of a compact straight connection where the prepared entry is close to the pan.
View the WC-F18R
The longer model for a straight route that genuinely needs more reach. Its stated 170–410mm range gives installers a defined option when the soil-pipe entry sits beyond the WC-F18R range.
View the WC-F26RSet the pan in its intended finished position before choosing the connector. Check the centre line, floor finish, cistern clearance and the face of the prepared soil-pipe entry. A rough wall-to-pan dimension is not enough if it ignores how far the spigot projects or where the connector will actually seat.
Where the measured route falls inside 100–160mm, the McAlpine WC-F18R Flexible Pan Connector is the exact short model to check. Where the route needs 170–410mm, check the McAlpine WC-F26R Flexible Pan Connector. McAlpine’s straight flexible WC connector data identifies those two adjustment ranges and lists a 97–107mm inlet with a 4-inch/110mm outlet for the R versions.
Those published ranges leave no reason to guess around the boundary. A reading near either limit should trigger a proper dry-position check, not an assumption that the hose will take up the difference. Confirm the exact route with the pan held where it will be fixed, and use current manufacturer information if the connection or soil-pipe arrangement is uncertain.
| Selection point | WC-F18R | WC-F26R |
|---|---|---|
| Stated adjustment range | 100–160mm | 170–410mm |
| Practical use | A compact straight connection where the measured entry sits close to the pan. | A longer straight connection where the measured entry sits beyond the short-model range. |
| Exact reference | SKU WC-F18R; EAN 5036484021953. | SKU WC-F26R; EAN 5036484006264. |
| Do not use it to | Force a connection that needs more reach or a different outlet route. | Hide a severe alignment problem by packing unnecessary flexible length into a tight space. |
Reach is only one part of the decision. Check that the flexible section has a clean path and is not crushed behind the pan, trapped against a sharp edge or forced around a turn that the layout should solve with a different connector type. The longer body of the WC-F26R 170–410mm Connector is useful only when there is room for that length to sit correctly.
The shorter WC-F18R 100–160mm Connector should not be selected merely to keep the fitting out of sight. If the soil entry is too far away, pulling the pan backwards or stretching the connector to the limit changes the set-out and can leave the finished suite under strain. The pan position, connector route and fixing points need to agree before holes are drilled.
On replacement work, inspect the exposed pan spigot and soil-pipe entry after removal. Old sealant, damaged fins, debris, distorted pipework or a poorly supported pan can turn a nominally simple swap into a different job. Do not treat the model number as proof that the existing route is sound. Clean and inspect the mating surfaces, follow the current McAlpine fitting instructions and replace damaged components rather than building around them.
“Flexible pan connector” is not a complete picking instruction when the available reach changes by model. For the short route, record McAlpine WC-F18R, SKU WC-F18R and EAN 5036484021953. For the longer route, record McAlpine WC-F26R, SKU WC-F26R and EAN 5036484006264.
Before disturbing an installed WC, isolate the cistern water supply, empty it in a controlled way and protect the work area. After fitting, secure the pan as required for the installation, restore the supply, flush repeatedly and inspect every connection. If the measured route, pipe condition or support cannot be confirmed, stop and correct the layout instead of relying on the flexible body to conceal it.
Bring the measured reach and exact model reference to APM Plumbing & Electrical at 24 Western Avenue, Acton, W3 7TZ. Call 020 8702 8080 or check the exact product pages before travelling.
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