Hi GB,
Live Chat on the website is online at the moment, if you want to discuss there.
Prices have just changed (yesterday) on our website.
In answer to your questions:
also, im gonna fit it on a slx-25 so...
1) What thread do i need?
Choose "Metal or Plastic"
2) Do i need a 10m or 30m hose?
30m is just over 98 feet.
10m is just under 33 feet.
10m will be adequate for your SL-X25 at full extension, but you may want more for future use, or out of preference.
3) Ive selected cold for Temperature, as i am cold pure water only!
4) What Push-fit Tee Connector do i need?
You don't NEED a Push-fit Tee Connector, they're just a bit quicker/easier to use than the barbed Y pieces. I think the Superlite brushes (if you're getting one of those) have 6mm jet hoses.
Paul