Water Gauge Top Isolation Valve Small Scale Product Price $60.00 Add to CartClick to add this item to cart. SKU: VGWTIS Product Description Silicon Bronze lost wax casting. Allows for proper isolation and blowdown operation of water gauge. Water gauge thread is 1/4-40 MTP Inlet from Boiler top connection is 1/4″ union connection with Solder Socket (SS) << return to products