I purchased a 1048 off for sale thread. When I got the pump it was huge and says "typ 1050" on the back. On the l/min area it says 20 which comes out to like 317gph. People always praise the 1048 for making no noise however this pump is somewhat loud. Has anyone ever used this pump on their WC loop? Noise may lower alot after I bleed the remaining air but I am wondering if I should keep this.