Wilkins - 1-950XLUS - 1" 950XL Double Check Backflow Valve Assembly, with Union Ball Valves & Strainer "Product Class_Other" they include a fully adjustable

they include a fully adjustable swivel arm with vibration-proof locking teeth and are available with both conventional and LED technologies

As for compatibility

Both create a soft luminescent ambience

FX DM Path Light

Attaches quickly and securely

Wilkins - 1-950XLUS - 1" 950XL Double Check Backflow Valve Assembly, with Union Ball Valves & Strainer "Product Class_Other" they include a fully adjustable1" Double Check Backflow Valve Assembly Top Access Vertical Flow up: 1 1 4" thru 2" With Union ball valves With Bronze "Y" type strainer The Zurn Wilkins 950XL Double Check Valve Assembly is a wye pattern backflow preventer used in low hazard, non potable applications. Documents: Specification Sheet