i have used this system and provided you cut everything with cutters and make it square it will work, however if you get any pressure on the fittings or the pipe at the connection point it is subject to failure . it also does not like to be reused as it tends to leak(mainly just a slow drip and proves impossible to fix ) i like this system on land but not on boats where everything is constantly moving.
The better system is a similar type which is used in housing. It is a plastic pipe rated for commercial
water pressure with plastic/brass fittings they come by a variety of names but Sharkbite is one. The fittings are simply just pushed on and to remove, a pipe clip is just slid along the pipe to the fitting releasing the fitting by pulling the fitting while applying pressure with the pipe clip. this is great in tight spots and ease of repairs
or additions is a breeze. only tools are conduit pipe cutters and a plastic pipe clip . Most plumbing
supply shops should stock these systems and are 20-30% cheaper than Whale in Australia
i have some of these systems in 12mm (1/2 inch) for both fresh and salt water
systems in use now for the past 6 years and recently add to one system and had no problems.