An industrial regulator with larger orifices for better flow is the Watts Model 263A. This brass unit also offers an adjustable pressure limit and is available with a pressure gauge.
Because of its size and lighter weight, it is our most popular model and it produced a flow of 4 to 4.5 GPM in out test. As you can see above, you can optimize the Watts 263A to your needs. If the product will be out in the elements, you might consider adding stainless steel external screws and/or a stainless steel, oil filled gauge. Stainless steel will not rust, so it is perfect for leaving outside attached to the hose spigot. The oil in the oil filled gauge will keep the face clear and also dampens vibration during travel. For the ultimate durability, you might select the fully stainless model.
