FORCE MAIN DISCHARGE MANHOLE – UPWARD & DOWNWARD SLOPING (2) Sections of a force main discharge manhole for an upward slope and downward slope flow. Includes manhole construction requirements. Add to wish list $5.00 – Purchase Checkout Added to cart You must log in to submit a review. Username or Email Address Password Remember Me Buying Options Add to wish list $5.00 – Purchase Checkout Added to cart