A step-by-step guide to installing a counter current swim jet in a DIY plunge pool, swim spa or large hot tub: sizing, depth, fitting it to block, concrete or liner walls, plumbing the pump and wiring the air switches.
27
Jun
Jun
Jody wanted a Miami-style pool and hot tub combo in rural Northern Ireland, and found a genius way to dodge the “swimming pool tax”. Follow his build from the first dig to his first swim.
Air Source Heat Pump Related, Reviews & Info
Hydro Royal Heat Pump Review: HR 110, HR 125 and HR 150 Compared
22
Jun
Jun
Hydro Royal heat pumps are made in the USA with a 10-year limited warranty. Here’s how the HR 110, 125 and 150 compare, what the AHRI numbers mean, and which DIY builds they suit.
DIY Hot Tub Building, Plumbing Related, Support & Maintenance
Using a Priming Circuit on a Centrifugal Hot Tub Pump Above the Water Line
15
Jun
Jun
A real-world fix for a centrifugal hot tub jet pump that wouldn’t prime because the pipework sat too high, using a self-priming pump and three ball valves, plus the options to consider first.
DIY Hot Tub Building, Materials and Construction Related, Plumbing Related
Hot Tub Pipe: Sizes, Types and Pressure Ratings Explained
14
Jun
Jun
Everything you need to know about hot tub pipe before you order: imperial vs metric sizes, what sizes a DIY tub needs, pressure ratings in hot water, rigid vs flexible, and testing.
Air Source Heat Pump Related
Comfortline Heat Pump Review (2026): The Air Source Heat Pump on My Own Hot Tub
07
Jun
Jun
The Comfortline inverter is the air source heat pump on my own hot tub. Here’s the current 2026 range, the specs that matter, and how it has performed for me, cold weather included.
Case Studies / Example Projects, DIY Hot Tub Building
My Hot Tub Control Room Remodel: What I Changed and Why
22
May
May
The control room was the part of my own hot tub I was least proud of. Here’s how I rebuilt it, what the heat pump did to my running costs, and what I’d do today.
Air Source Heat Pump Related, Support & Maintenance
How I Cut My Hot Tub Running Costs by 66% with an Air Source Heat Pump
19
May
May
My before-and-after smart meter figures from fitting an air source heat pump to my DIY hot tub: heat-up, use and weekday costs, what it would cost at today’s prices, and how quickly it paid for itself.
Cocktail & Plunge Pool Related, Design / Ideas Related
Pool and Hot Tub Plumbing: Why They Should Stay Separate (and What You Can Share)
16
May
May
Why you can’t just add jets to a pool pump, where sand filters and variable-speed pumps fit, and how to share a heater or build a spillover spa properly.
Air Source Heat Pump Related
Why I Fitted an Air Source Heat Pump to My DIY Hot Tub (and How I Plumbed It In)
15
May
May
Why I added an air source heat pump to my own slow, expensive DIY hot tub, and how I fitted it with a separate pump loop and relays without drilling any new holes in the shell.