Apparently, the P50 has a smaller diameter bristle than the PB5 (16909 on most eBay listings).
From an Amazon review: I went to Rutland.com's web site and realized their Chimney Sweep Brand 16906 brush is made of poly bristles that are .100" in diameter, which is very stiff. Rutland also makes a P50 Poly Pro Professional's Choice PB-6P50 brush that is one step up in their quality line and is made with bristles that are .050" in diameter.
Pros/cons of the stiff vs. softer bristles? The only issue I see would be reversing direction with the stiffer bristles. Does anyone have any idea which one would clean better? I'm burning a Woodstock Ideal Steel with new liner this year, so I don't expect much buildup to start with.
From an Amazon review: I went to Rutland.com's web site and realized their Chimney Sweep Brand 16906 brush is made of poly bristles that are .100" in diameter, which is very stiff. Rutland also makes a P50 Poly Pro Professional's Choice PB-6P50 brush that is one step up in their quality line and is made with bristles that are .050" in diameter.
Pros/cons of the stiff vs. softer bristles? The only issue I see would be reversing direction with the stiffer bristles. Does anyone have any idea which one would clean better? I'm burning a Woodstock Ideal Steel with new liner this year, so I don't expect much buildup to start with.