A: The Porphis repair kit series is designed to cover the full range of Porphis spray guns. Each kit listing specifies which model series it is compatible with — match your gun's model number (e.g. PRD-817, PRD-715, PHS-155) to the kit description before ordering. If you're unsure, contact us with your gun's model number and we'll confirm compatibility before you purchase. Ordering the wrong kit is the most common accessory mistake — we'd rather help you get the right one than process a return.

A: Porphis repair kits include the most commonly replaced internal components: needle, nozzle tip, air cap, PTFE needle seal, cup gasket, and fluid tip O-rings. These cover the five most frequent failure modes: leaking at the needle seal, worn nozzle tip causing pattern drift, damaged air cap, degraded cup gasket causing paint seepage, and O-ring failure causing fluid path leaks. If your gun has developed a specific problem — leaking, pattern inconsistency, trigger feel change — the part responsible is almost certainly in the kit.

A: All components in the Porphis repair kit are designed for owner replacement without specialized tools. The needle and nozzle are hand-thread removable; the PTFE seal and O-rings require only needle-nose pliers and the included wrench. Most users complete a full internal service in 15–20 minutes on their first attempt. We include a step-by-step disassembly guide with every kit. If you can clean your spray gun, you can service it.

A: Four clear signs it's time for parts replacement, not more cleaning:

Pattern inconsistency that persists after thorough cleaning → worn nozzle tip
Dripping at the fluid tip when trigger is released → worn needle seal or damaged needle tip
Air leaking around the trigger → PTFE needle seal degradation
Paint seeping around the cup joint → cup gasket failure
If cleaning resolves the symptom temporarily but it returns within one session, the underlying component has worn beyond what cleaning can compensate for.

A: Porphis replacement components are manufactured to the same specification as the original factory parts — same material grade (303stainless steel for needle and nozzle, PTFE for seals), same dimensional tolerances. There is no degradation in material quality between original and replacement. Service life depends on cleaning frequency and material compatibility: guns cleaned thoroughly after every session with compatible solvents will see needle and nozzle life measured in years; guns left with dried paint in the fluid path will wear significantly faster regardless of component quality.