cooling system T-piece options

[jmaz]

For my 310 Encore build, I'm considering replacing the supplied, blue-plastic T-piece that connects the engine, modine and expansion tank with the one recommended here (Gates 19mm T-piece, part # 28635) (https://caterham420detailedbuildblog.co.uk/2019/12/19/engine-plumbing-part-1/) or a stainless steel version.  The Gates one (nylon-reinforced plastic) is designed specifically for auto use and might be more durable overall.  Any suggestions or experience re. this t-piece would be welcome.  

[7Westfield]

I consider those blue fittings suitable only for PCV/vent applications

or your lawn sprinkler