A PEL 21S gas control tap with flame failure device (FFD), listed as Blue Seal 227404, for Blue Seal G59, G592, G594 and G598 chargrills, the Blue Seal G50 oven and the Cobra CB6 chargrill.
Several 21S versions exist, so check three things on your old tap: an M9 x 1 thermocouple thread (some use M8 x 1), the flat of the D-shaped shaft on the lower face, and M16 x 1.5 inlet and outlet with a 0.4 mm bypass.
Gas appliance parts must be fitted by a Gas Safe registered engineer.
Model lists are a guide: match the thermocouple thread, shaft flat and bypass against your existing 21S before ordering.
| Type | PEL 21S gas tap with flame failure device and pilot outlet |
| Gas inlet | M16 x 1.5 (10 mm) |
| Gas outlet | M16 x 1.5 (10 / 8 mm) |
| Thermocouple connection | M9 x 1 |
| Bypass | 0.4 mm |
| Shaft | 8 x 6.5 mm D-shape, flat on lower face, 22 / 15 mm long |
| Body | Brass |
| Supplied | Tap only, no knob or thermocouple |
| Condition | New |
Is Blue Seal 227404 a PEL 21S gas tap?
Yes. This is a PEL 21S tap with flame failure device, listed as Blue Seal 227404.
Does the 21S tap fit a Blue Seal G592 chargrill?
Yes. The G59, G592, G594 and G598 chargrills are listed, with the G50 oven and Cobra CB6.
How do I tell which PEL 21S version I need?
Check the thermocouple thread (M8 or M9), which face of the shaft is flat, and the bypass size. This one is M9, lower flat, 0.4 mm.
Does the PEL 21S come with a knob?
No. It is the tap only; knob and thermocouple are separate.
Brand names and model numbers are used for identification and compatibility purposes only. Unless stated otherwise, parts are replacement parts and are not made or endorsed by the equipment manufacturer.