Blob

Absolutely correct Tony my mistake. However, the two rubber seals top and bottom are rubber and won't last long in a fire, is that not a bit of a nonsense? I still have a new spare if John wants it

Hi John.k. you buy the whole thing new for not a lot, change the bottom and keep the rest as spare. The plastic stoppers are better. I have a spare one if you're anywhere near Stoke on Trent.

Get a red fibre washer of the correct size. Too easy to over tighten rubber o rings and washers.

I used to fit blinds and wouldn't advise faux wood. You can get nice venetians made to measure on the Internweb for not a lot of money. When they get grubby hang em on a fence and wash with fairy and a soft brush, hose off = happy bunny.

Whale gulper all day long. Pumps for years including debris up to 8mm.

Green with wire spiral. Tough as old boots. A couple of quid a metre from Machine Mart