SupaJet White Plastic Inlet Nuts (pair) 2071

 The plastic olives are unavailable.

You may find copper ones in B&Q or some were similar, don’t use the brass, the copper ones are softer.

If you grease the threads with silicone grease before tightening the nuts.

You then have a balancing act.............You have tighten the nuts up enough to keep the pipes water tight but not enough to split the plastic nuts.

Hope this helps!