--- title: How to Clean or Replace Bypass Poppet On A GPRO PRO20/PRO35 Pump description: Cleaning or replacing a poppet in a GPI GPRO PRO20/PRO35 fuel transfer pump is a straight forward task. Take a look at this walkthrough to learn to do it. --- [Skip to content](https://support.farmchem.com/knowledge-base/how-to-clean-or-replace-bypass-poppet-on-a-gpro-pro20/pro35-pump#main-content) [![FarmChem Logo Supporting Hands Black](https://support.farmchem.com/hs-fs/hubfs/FarmChem%20Logo%20Supporting%20Hands%20Black.webp?width=275&height=68&name=FarmChem%20Logo%20Supporting%20Hands%20Black.webp)](https://support.farmchem.com/knowledge-base?hsLang=en) - [Shop](https://farmchem.com/) - [Blog](https://support.farmchem.com/blog) - [About Us](https://farmchem.com/about-us) - [Tender Trailer Tool](https://farmchem.com/tender-trailer-tool/) - [Knowledge Base](https://support.farmchem.com/knowledge-base) Open main navigation Close main navigation - [Shop](https://farmchem.com/) - [Blog](https://support.farmchem.com/blog) - [About Us](https://farmchem.com/about-us) - [Tender Trailer Tool](https://farmchem.com/tender-trailer-tool/) - [Knowledge Base](https://support.farmchem.com/knowledge-base) - [Contact us](https://farmchem.com/contact-us/) [Contact us](https://farmchem.com/contact-us/) How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://support.farmchem.com/knowledge-base?hsLang=en) 2. [Helpful Videos](https://support.farmchem.com/knowledge-base/helpful-videos?hsLang=en) 3. [Repairs & Maintenance](https://support.farmchem.com/knowledge-base/helpful-videos?hsLang=en#repairs-maintenance) # How to Clean or Replace Bypass Poppet On A GPRO PRO20/PRO35 Pump ## Replacing the poppet within a PRO20/PRO35 pump is straight forward. Here's how you can do it. If you need to clean or replace the bypass poppet inside a GPRO PRO20/PRO35 Fuel Transfer Pump, watch the instructional video above or read the instructions below. *Remember to wear properly fitting PPE when doing this task!* 1. Turn off the pump and disconnect from power 2. Use a pipe wrench to unscrew the bypass plug, spring and bypass poppet from the pump 3. Inspect the o-ring on the poppet (part numbers: 133505-01, 133505-04) for damage or wear 4. If poppet components contain debris, wipe them clean with a clean cloth 5. Before reassembling, remove the bypass plug o-ring and lightly coat with grease, then reinstall it back on the bypass plug 6. Reinsert the bypass poppet, spring, and plug into the pump. Tighten in place --- **Offerings covered by this post:** [GPI PRO20 115V Fuel Transfer Pump, 1″ Manual Nozzle, 18′ Hose & Tank Adapter Mount (20 GPM) – PRO20-115MD](https://farmchem.com/product/pro20-115v-fuel-transfer-pump-1-manual-nozzle-18-hose-tank-adapter-mount-20-gpm-pro20-115md/) [GPI PRO20 115V Fuel Transfer Pump w/QM Meter (20 GPM) – PRO20-115PO/QM40G8N](https://farmchem.com/product/115v-fuel-transfer-pump-w-qm-meter-20-gpm-pro20-115po-qm40g8n/) [GPI PRO20 115V Fuel Transfer Pump w/QM Meter, 18′ Hose & 1″ Auto Nozzle (20 GPM) – PRO20-115AD/QM40G8N](https://farmchem.com/product/pro20-115ad-qm40g8n/) [GPI PRO20 115V Fuel Transfer Pump, 1″ Auto Nozzle, 18′ Hose & Tank Adapter Mount (20 GPM) – PRO20-115AD](https://farmchem.com/product/pro20-115v-fuel-transfer-pump-1-auto-nozzle-18-hose-tank-adapter-mount-20-gpm-pro20-115ad/) [GPI 115V/230V PRO35-115AD Fuel Transfer Pump, 1″ Auto Nozzle & 18′ Hose (35 GPM) – PRO35-115AD](https://farmchem.com/product/115v-230v-pro35-115ad-fuel-transfer-pump-1-auto-nozzle-18-hose-35-gpm-pro35-115ad/) [GPI 115V/230V PRO35-115 & QM40 Combo, No Nozzle (35 GPM) – PRO35-115PO/QM40G8N](https://farmchem.com/product/115v-230v-pro35-115-qm40-combo-no-nozzle-35-gpm-pro35-115po-qm40g8n/) [GPI 115V/230V PRO35-115 & QM40 Combo w/1″ Automatic Nozzle (35 GPM) – PRO35-115AD/QM40G8N](https://farmchem.com/product/115v-230v-pro35-115-qm40-combo-w-1-automatic-nozzle-35-gpm-pro35-115ad-qm40g8n/)   - 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