Answer
Jan 14, 2026 - 02:18 PM
The connection for the cap on the S4B.40 model is associated with a 1/2-inch cap threading.
This suggests the o-ring diameter would likely be slightly larger than 1/2 inch to create a seal. We don't stock the o-ring replacement. How ever the DEMA part # is 21.8. You can contact our customer service department for an RFQ (request for Quote ) frommanufacturer
This suggests the o-ring diameter would likely be slightly larger than 1/2 inch to create a seal. We don't stock the o-ring replacement. How ever the DEMA part # is 21.8. You can contact our customer service department for an RFQ (request for Quote ) frommanufacturer
