HM1 Series Pressure-Vacuum Relief Valve with Manual Relief Button Quantity discounts available QuantityPrice SKU: .HM1Series Pressure-Vacuum Relief Valve-Manual Relief Button Estimated Dock Date List Price / Net Cost Connection 1 Thread Size : 3/8 in - 18 3/4 in - 14 Cracking Pressure : 5 psi 10 psi 15 psi Customer Revision $268.91 to $308.30 -+ Add to Cart Quantity available represents our stock on hand for immediate shipment. If you require additional quantities place your order for the full amount and we will secure the additional stock you need! Show Available Part Numbers HM1-10-6MPHM1-15-12MPHM1-05-12MPHM1-10-12MP Product Details