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Heating-system protection developed from hands-on gas engineering experience, with practical products designed to protect systems from debris, trapped air and pressure problems.
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TomKat Gas Training
TomKat Y-Plan Reference Sheet - Printed Copy
TomKat Y-Plan Reference Sheet - Printed Copy
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Want both Y-plan and S-plan?
Add this sheet to your basket, then choose your S-plan sheet and add that too. Check out once when you have finished choosing. Both sheets can go in one order, with one printing, packaging and postage charge for the sheets.
Looking for the six-sheet pack?
The complete six-sheet pack includes Y-plan, S-plan, installation and purge volumes, natural-gas pipe sizing, LPG propane pipe sizing and gas inspection preparation. Choose plain or laminated. The pack already includes both plans, so choose the pack instead of adding individual sheets.
Current reference sheet version 1.3 — 25 October 2026
One landscape A4 sheet, printed on both sides. This listing is for a physical copy, sent by post.
For the conventional 230 V arrangement with one five-wire mid-position valve. Follow the call for heat on the front, then compare it with the numbered example wiring on the reverse.
For free PDF downloads, visit the Resources section on the TomKat Gas Training website.
Choose your finish
Plain: £0 for the sheet. Laminated: £1 extra per sheet, sealed in a clear protective pouch.
Printing and delivery
Printing, packaging and UK Second Class postage costs £3.50 for 1–2 sheets or £3.99 for 3–6 sheets, added at checkout. Maximum six different printed worksheets or reference sheets per order. Choose one copy of each document, plain or laminated, not both. Plain sheets are £0; lamination is £1 extra per sheet. Other products may have separate delivery charges. Postal service only.
Using your reference sheet
These are learning references for the conventional five-wire examples shown, not complete installation, fault-finding or live-testing procedures. Follow the instructions for the actual controls and boiler, including permanent-live and pump-overrun arrangements. Electrical work requires competence and safe isolation.
The images are obscured SAMPLE previews. Your printed sheet will be clear and unwatermarked.
Updated versions
Your order covers the sheet version supplied. If we publish an updated version later, we won’t automatically send another printed or laminated copy. A new print-and-post order is charged at the rates shown at that time. This does not affect your statutory rights.
Original TomKat teaching content and design © 2026 TomKat Gas Training Ltd. Personal study or own work. No resale or republication. Third-party rights remain with their owners.
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