PARTS · DIAPHRAGMS · PULSAFEEDER
Pulsafeeder PULSAtron KOPkits and Diaphragms
Keep-On-Pumping Kits (KOPkits), PEP kits and replacement diaphragms for PULSAtron solenoid metering pumps — matched by head size, at factory-direct compatible prices.
1. Find Your PULSAtron Head Size
The head size is the second digit in the model code: LC14A2 = head size 4, LC13A2 = head size 3. It determines the diaphragm diameter and kit selection.
| Head Size | Typical Models | Flow Range | Note |
|---|---|---|---|
| Head Size #2 | LC12A2 / LC12B2 | 1.4–12 GPD | Smallest PULSAtron head — A/B drive variants |
| Head Size #3 | LC13A2 / LC13B2 | 3.5–38 GPD | Most common pool & spa dosing head |
| Head Size #4 | LC14A2 / LC14B2 / T7 | 6–58 GPD | Mid-range; diaphragm kit PUL-5PKDIA4 (5-pack) |
| Head Size #5 | LC15A2 / LC15B2 | 12–120 GPD | Larger flows — check liquid end material code |
2. What's Inside a KOPkit
Pulsafeeder's official KOPkit (Keep-On-Pumping Kit) is the complete liquid-end service set — everything needed to return the pump to as-new condition:
| Component | Note |
|---|---|
| Primary diaphragm (flat) | PTFE-faced, CSPE-backed for most models |
| Secondary diaphragm (tube) | Hydraulic pump models |
| Check valves (balls and seats) | Ceramic / PTFE / stainless options |
| O-rings and gaskets | Material matched to liquid end |
| Oil seal | Drive-side seal, hydraulic models |
| Installation instructions | Step-by-step OEM procedure |
3. DOSEPARTS Quote SKUs
Our compatible equivalents cover the KOPkit contents and individual diaphragms. Order by head size or send the full model code:
| DOSEPARTS SKU | OEM Ref. | Fits | Note |
|---|---|---|---|
| DSP-PULS-DIA-5PK-4 | PUL-5PKDIA4 | PULSAtron Head Size #4 | 5-pack diaphragm kit (PTFE-faced CSPE) |
| DSP-PULS-KOP-3 | KOPkit (by model) | PULSAtron Head Size #3 | Full KOPkit — diaphragm, valves, seals |
| DSP-PULS-KOP-4 | KOPkit (by model) | PULSAtron Head Size #4 | Full KOPkit — diaphragm, valves, seals |
| DSP-PULS-KOP-5 | KOPkit (by model) | PULSAtron Head Size #5 | Full KOPkit — diaphragm, valves, seals |
KOPkit part numbers vary by exact model and liquid-end material — send us your full model code (e.g. LC14A2-VTC1-CZXXX) for an exact cross-reference.
4. Replacement Tips
- ✓ Read the model code left to right: LC (PULSAtron), 1 (solenoid), 4 (head size), A (drive), 2 (liquid end material).
- ✓ A KOPkit bought as a set costs less than individual parts and guarantees all seals are replaced together.
- ✓ Replace the diaphragm every 12–24 months or at the first sign of output drift.
- ✓ For PULSAtron X (explosion-proof) models, confirm the same head-size kit applies — the drive differs but the liquid end is shared.
Frequently Asked Questions
What is a KOPkit?
Keep-On-Pumping Kit — Pulsafeeder's official preventive-maintenance kit containing the diaphragm, check valves, o-rings, gaskets and oil seal needed to service the liquid end.
How do I know my PULSAtron head size?
It's the second digit of the model code (LC14A2 = size 4). If the nameplate is gone, measure the diaphragm outer diameter and compare against our head-size table.
Are your parts OEM or compatible?
We supply both. Compatible diaphragms match the OEM dimensions and PTFE-faced CSPE-backed construction at 30–60% lower cost.
Need the Right Pump Part Fast?
Factory-direct pricing on compatible diaphragms, valve cartridges, PMK kits and liquid ends for LMI, ProMinent, SEKO, Milton Roy and Pulsafeeder pumps. Send your pump model and get a quote within 24 hours.