Barrel Union White Adjustable 40mm OngaUpgrade your Onga spa and pool plumbing with the Barrel Union White Adjustable 40mm. This swivel style assembly is designed to deliver a reliable, seal tight connection even when pipe ends arent perfectly aligned, making installations quicker and less fussy. Designed for 40mm socket to 40mm socket piping, this barrel union sits between two 40mm pool pipes and uses its swivel capability to fine tune alignment as you connect. The result is a secure,