--- product_id: 21569282 title: "Bag Filter, 155384, BP-420-1 Polypropylene 1 Micron, 4.5\" x 20\"" price: "Rp875114" currency: IDR in_stock: true reviews_count: 8 url: https://www.desertcart.id/products/21569282-bag-filter-155384-bp-420-1-polypropylene-1-micron-4 store_origin: ID region: Indonesia --- # 1 micron ultrafiltration precision High-temp resistant polypropylene Felt media for max dirt-holding Bag Filter, 155384, BP-420-1 Polypropylene 1 Micron, 4.5" x 20" **Price:** Rp875114 **Availability:** ✅ In Stock ## Summary > 💧 Filter smarter, not harder — keep your pool pristine all season long! ## Quick Answers - **What is this?** Bag Filter, 155384, BP-420-1 Polypropylene 1 Micron, 4.5" x 20" - **How much does it cost?** Rp875114 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/21569282-bag-filter-155384-bp-420-1-polypropylene-1-micron-4) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Proven Pool Savior:** Trusted by pool pros to eliminate pollen, silt, and algae without draining your pool - • **Heavy-Duty Dirt Capacity:** Felt media traps more debris, reducing frequent change-outs - • **Ultra-Fine 1 Micron Filtration:** Captures the tiniest particles for crystal-clear water - • **Built to Endure Extreme Conditions:** Polypropylene design withstands acidic, alkaline & corrosive fluids plus high heat - • **Effortless Maintenance & Reusability:** Washable and durable for multiple pool seasons—save money and hassle ## Overview The Pentek BP-420-1 Bag Filter is a 1 micron polypropylene filter bag measuring 4.5" x 20", engineered with felt media for superior dirt-holding capacity. It excels in filtering fine particles from pools and other fluids, tolerating high temperatures and corrosive environments. Designed for easy, fast change-outs and reusable cleaning, it’s a cost-effective solution that outperforms standard cartridge filters, ensuring cleaner water and less maintenance. ## Description The Pentek BP-420-1 Filter Bag provides higher productivity with faster bag "change-outs." The bags are manufactured from felt because it can take on a heavy load of solids, in comparison to similar mesh fabrics. The manufacturing process involves multiple steps: layering together the felt material on a screen for support, then finishing it with a glaze for a secure bond. This is a product that can certainly hold its own as it filters dirt and debris. Review: Used for above ground pool to filter fine particles when vacuuming - Had problems with pollen/silt in the bottom of my pool this year. Cartridge filter not able to filter out the smaller microns and I assumed it was blowing it all back into the pool. Attached DANMAR Directional Pool Skimmer Jet Return Nozzle and then cut off the end of this filter to attach to it. Had to rig it to hold with couple of zip ties (cut holes to thread zip tie for tight fit) and clamped the open part- It WORKED!!! I was worried it would build up too much pressure on my pump but didn't raise it much. By the time I finished vacuuming I could see that it was blowing the dirt directly back into my pool like i thought. This filter caught what was blowing back into pool. After vacuuming I disconnected the vacuum and let it run for an hour to catch anything I stirred up then removed it and put regular return eyeball back on. Checked an hour later and the pool was clean- nothing settled back to the bottom. Wish I had discovered this at the beginning of the season, but ready for next year! Well worth the money and will buy more! Very pleased!! Review: Saved me from having to empty my pool - I have a 18' Intex swimming pool that had a major attack of algae at the end of last season. I was thinking I was going to have to empty it. I then found these mentioned on a YouTube video, and decided to give it a try. Man, these guys are the real deal. The amount of junk it catches that the filter misses is phenomenal. They can be used by simply throwing them in the wash. I am thinking I will continue to use these throughout this season as it works better than the paper filters, and they are reusable. Inexpensive too. Thank you whoever makes these. If you have a dirty swimming pool, get these. ## Features - 1 micron ultrafiltration - Compatible with a wide range of acidic and alkaline fluids, and other corrosives - Withstands high temperatures - Manufactured with felt media for high dirt-holding capacity ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.4 out of 5 stars 326 Reviews | ## Images ![Bag Filter, 155384, BP-420-1 Polypropylene 1 Micron, 4.5" x 20" - Image 1](https://m.media-amazon.com/images/I/61sMmcOOO0L.jpg) ## Questions & Answers **Q: Has anybody tried using this with a Venturi style pool vacuum? If so, how well did it work?** A: I found that these bags work every bit as well as the more expensive ones that our plumbing sub sold us. I will definitely reorder them. **Q: if you pour water into this how long does it take to drain with just gravity?** A: Don't know, we pump the water thru it with a pump. I think it would flow right it, with just gravity. A great filter. **Q: Is this bag "food grade"** A: Yes it is by definition of “Food Grade” **Q: Can this be used to filter cold brew coffee?** A: Not sure. Its ised to filter sediments from water so I'm mot sire why not. But I would think it is for cold water only. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Used for above ground pool to filter fine particles when vacuuming *by M***K on August 21, 2022* Had problems with pollen/silt in the bottom of my pool this year. Cartridge filter not able to filter out the smaller microns and I assumed it was blowing it all back into the pool. Attached DANMAR Directional Pool Skimmer Jet Return Nozzle and then cut off the end of this filter to attach to it. Had to rig it to hold with couple of zip ties (cut holes to thread zip tie for tight fit) and clamped the open part- It WORKED!!! I was worried it would build up too much pressure on my pump but didn't raise it much. By the time I finished vacuuming I could see that it was blowing the dirt directly back into my pool like i thought. This filter caught what was blowing back into pool. After vacuuming I disconnected the vacuum and let it run for an hour to catch anything I stirred up then removed it and put regular return eyeball back on. Checked an hour later and the pool was clean- nothing settled back to the bottom. Wish I had discovered this at the beginning of the season, but ready for next year! Well worth the money and will buy more! Very pleased!! ### ⭐⭐⭐⭐⭐ Saved me from having to empty my pool *by K***R on May 5, 2021* I have a 18' Intex swimming pool that had a major attack of algae at the end of last season. I was thinking I was going to have to empty it. I then found these mentioned on a YouTube video, and decided to give it a try. Man, these guys are the real deal. The amount of junk it catches that the filter misses is phenomenal. They can be used by simply throwing them in the wash. I am thinking I will continue to use these throughout this season as it works better than the paper filters, and they are reusable. Inexpensive too. Thank you whoever makes these. If you have a dirty swimming pool, get these. ### ⭐⭐⭐⭐⭐ Wish I would have installed a whole-house bag filter to the well long ago. *by B***N on November 14, 2025* A minor inconvenience over the past couple decades with sediment and sand plugging up faucet screens and making their presence in the toilet tanks and setting a routine every two or three months of cleaning all the fixtures. With this bag filter setup there is little, if any perceptible pressure or flow loss and no sediment or sand in our water. Our plumber recommended we check it in six months to see how much is collected, and if the pressure gauge on the filter assembly is low, change the filter. The filter change process is very simple and relatively inexpensive compared to the extensive time for plumbing cleanings every couple of months as we did before the filter addition. ## Frequently Bought Together - Bag Filter, 155384, BP-420-1 Polypropylene 1 Micron, 4.5" x 20" - Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Pentek BP-420-5 Polypropylene Bag Filter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.id/products/21569282-bag-filter-155384-bp-420-1-polypropylene-1-micron-4](https://www.desertcart.id/products/21569282-bag-filter-155384-bp-420-1-polypropylene-1-micron-4) --- *Product available on Desertcart Indonesia* *Store origin: ID* *Last updated: 2026-05-13*