Yes standard but he may have been stumped because they are not regularly seen out in the wild I only came across a couple in 40 odd years, so not surprised if he was unsure.
If loops is removed there would be two caps to attach to the open ends. Think you may find that the removal of filling loop will be if it’s external to the boiler
Not used but I am always wary of sites that suddenly appear and the date of website is new that one says 2025. I would steer clear until it’s proven, just looked and your right phone number is Dover. I can’t see any large store selling...
I wouldn't go off numbers on pumps to be honest. Fancy modern pumps work well if everything else is well.
The one that gets warm first will be flow.
Uponor will tell you whether direction through their valves matters.
There would...
The manifold should be a complete with pump and integral bypass look on line and you will see what it should look like I would be surprised if has ever worked properly...
The flush machine has the pump that’s why I said turn off the flow and return and connect the machine the magnet unit is great it speeds up the job, I used it in conjunction with the Kamco machine.