Homebrew Hop Spider & Mash Filter in 304 Stainless Steel (AISI 304 (1.4301)) is used for containing hop pellets in the kettle and grain in the mash tun so wort flows clear into the fermenter. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Homebrew Hop Spider & Mash Filter Available in 304 Stainless Steel
| Size | Outer diameter (mm) | Length (mm) | Micron rating (u00b5m) | Mesh | Mount |
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| Spider 100 | 100 | 300 | 300 | 50-Mesh SS304 | Tri-leg kettle rim |
| Spider 150 | 150 | 350 | 300 | 50-Mesh SS304 | Tri-leg kettle rim |
| Dry-hop canister | 60 | 250 | 150 | 100-Mesh SS304 | Fermenter lid hook |
| Mash tun false bottom | 300 | 20 | 1000 | Perforated 1 mm | Dome + barb |
Where 304 Stainless Steel Homebrew Hop Spider & Mash Filter Is Used
- Homebrew retailers: hop spiders and dry-hop canisters for 5–20 gallon kettles.
- Nano-breweries: pilot batches with whirlpool hopping.
- Brew-in-a-bag systems: stainless false bottoms replacing cloth bags.
- Kombucha & cider makers: fruit and botanical steeping.
Ordering Homebrew Hop Spider & Mash Filter in 304 Stainless Steel
- Diameter & length: Size to the kettle depth so the spider basket sits below the wort line.
- Micron rating: 300 µm for boil hops; 150 µm for dry hopping to keep debris out of the fermenter.
- Mount: Tri-leg rim mount for kettles; lid hook for fermenters.
Mistakes to Avoid with Homebrew Hop Spider & Mash Filter
- Packing pellet hops into a fine canister, which lowers hop utilization.
- Using galvanized hardware that leaches zinc into wort.
