A: Hi Mhrobot, the 3" 90-degree elbow I.D. is 3.29"
A: Hi Michael, the 6" 90-degree elbow fitting O.D. is 6.51"
A: Yes, there is a grate available for a 4"-90 deg elbow. You will want a 4 inch round grate and most common is part #13 from the NDS website as seen below in the link. (You may need to copy and paste if the link doesn't work) https://www.ndspro.com/shop/drainage/grates-emitters/pipe-grates.html?shape=715&size=269
A: The inside dimension of the fitting is 4.24". This is designed to fit over a 4" Sewer and drain pipe(SDR 35).
A: This will snugly fit over the 4-inch PVC pipe just like assembling lego pieces. 4 1/2 inch diameter would be too big for your 4-inch pipe, you wouldn't want that.
A: The 4 inch elbow will fit over the 4 inch pipe
|Name||PVC S&D 90° Elbow, 6 in. Hub X Hub||4 in. PVC DWV 90-Degree Hub x Hub Street Elbow Fitting||PVC S&D Tee, 6 in. Hub X Hub X Hub||4 in. x 4 in. x 3 in. PVC DWV All Hub Reducing Sanitary Tee Fitting|
|Fitting 1 size||6"||4"||6"||4"|
|Fitting or Connector Type||Elbow||Elbow||Tee||Tee|
|Schedule Type||Schedule SDR35||Schedule 40||Schedule SDR35||Schedule DWV|
|Connectivity||Hub||Solvent Cemented||Hub||Solvent Cemented|
|Application||Non-Potable Water||Non-Potable Water||Non-Potable Water||Non-Potable Water|
|Features||Corrosion Resistant||Underground Rated||Corrosion Resistant||No Additional Special Features|
|View Product||View Product||View Product||View Product|