Replacement or spare Nipple Foster Valve for the RTI Prophet.
Important: Over time, this item has changed thread standard. Please check the specifications of your air rifle and select the correct thread size from the menu to ensure a proper fit and seal.
Available thread options:
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1/8" BSP — CURRENT FACTORY STANDARD
Select this option if you have a newer Prophet model. All our current breech blocks and regulator housings are machined to use the BSPP parallel thread standard.
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1/8" NPT — OLDER MODELS
Select this option if you have an earlier-generation Prophet. Our previous breech blocks and regulator housings were manufactured with the 1/8" NPT tapered thread standard.
Note: If you are unsure which version your Prophet requires, inspect your current valve or regulator housing before ordering. Mixing NPT and BSPP threads can result in an improper seal or thread damage.
