Both of my toilets have blue pex coming in and white hose from shut off valve to flush valve. I will leave that as is for now.
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Quick update I replaced the flex pipe from underneath to the toilet to pex and the hot and cold to the water heater as I had another leak
Well after replacing most all of the white hose with pex we had two minor leaks at the plastic shut off valve underneath 1/2 bath sink and one at one of the sinks in the master bath. I am still in the process of plumbing in 2 additional filters and securing everything the best I can. I replaced the 2 plastic valves that leaked with a brass union, should have never put the plastic back in with the pex. No leaks for a week now but I have been working & sick so have not been able to complete the plumbing job. I hope to do it starting Monday. I had to order some brass 1/2 pex to 3/4 water hose connections for the 2 filters to install. I will install shut off valves for the water heater and secure the pex every where I can. It’s not as neat and clean as I hoped for. But I hope no leaks in the future.
Tourusa I have plenty of pieces of the white hose if you want it?? But let me know quickly if you are interested. I will toss it in the dumpster soon or I can ship it to you.
I will post some of the videos and pictures on YouTube Channel of Pex installation when I get it finished and some pictures here on this site.
Eric Ramsey thank you for sharing the excellent plumbing diagram and I wish I had gone with ball valves for each line like you did. I hope the manifold I installed will work well enough.
Thanks to everyone
Ralph
Hi Ralph I still have a couple of 5ft lengths stashed behind the panel for the next one, I went with brass also ended up using a Jack saw to cut to length as it was an urgent job. Thanks for everyone’s advise into the Coleman not kicking into high cooling
And the drama continues, my bathroom sink is leaking at the pex to pvc braided pipe.
Im going to replace the fitting to the sink with brass but should I keep the length between the shut off and the pex to the pvc or something different ?
The braided is the exact length so cannot trim
I have found that the brass fittings are best and the plastic ones are usually trouble. I have had 2 leaks at the plastic shut off valve fitting. If possible replace the plastic valve with brass or just eliminate it. You can turn the main water off if you have a leak at the sink if you need to. Just my opinion.
Hi Ralph
should I remove the braided section and I go pex all the way to the Tap or will movement be a question ?
Thanks
I think you should leave the braided hose it will give you the flexibility for traveling. But the plastic fittings are trouble for the future replace them with brass ones if possible. I have regretted putting the plastic valves back in during my plumbing redo and I had to just eliminate 2 of them. That’s my opinion.
Ralph
You do mean the metal braided hose?
Hi Ralph I just went to HD and pickup the brass connectors 3.00 each and will keep the braided and recrimp to see how I get on. I looked at the metal braided (like at home but wrong connections.
The only issue is a cannot trim the existing pvc braided as it just fits or can reuse a piece from elsewhere to get a cleaner end as the inside is pretty worn due to the push braided fitting
GM Ralph, I have 1/2 inch pex for this braided pipe doesnt slide over would you know the size you used thanks
Im looking at buying a spare length off Amazon does this look like a good replacement below
appears I need 18.5 pex crimps for the pvc
Yes I used 1/2” Pex-B grade
Thanks Ralph i ended up with the below as the pvc line is old and couldn’t get the 17.5 pex over the pipe and the new brass OURU 50PCS Single Ear Hose Clamps, 15.3-18.5mm 304 Stainless Steel Ear Clamps, Stepless Adjustable Cinch Clamps for Automotive, Pipe, Plumbing: Amazon.com: Industrial & Scientific
Good luck 
you may want to get some leak detection so you can get a early warning of a leak
Ordered already from Amazon for the next round thanks Ralph