21′ round pools are very common and liners for your pool are usually in stock – available in overlap, beaded and expandable liner styles.
Select the pool type option that is appropriate for your pool.
Possible pool types are:
- Overlap
- Expandable (overlap with deep section)
- Beaded
21′ Round Pool Overlap Liners
Overlap liners fit hang over the wall of your pool under the pool top rail. They don’t have a bead and use coping strips to hold the liner. Oval overlap liners will fit any pool with wall heights up to 54″.
21′ Round Pool Beaded Liners
Above ground round liners that require a bead must be made with the correct bead type. You will need to know your pool bead type you require as well as the wall height of your pool. The wall height is best measured inside the pool from the bead track to the floor but away from any cove. Typical wall heights include 48″, 52″ and 54″ although other wall heights are not uncommon.
If your 21′ round pool liner need to be beaded and has a hopper you need to measure it as though it is an in-ground round pool. Click here for a measuring guide for you round pool with a hopper (deep area).
Most newer pools use the Standard bead type, however, there are older pools – such as Esther Williams, Johnny Weissmuller or Wilkes pools that require a special bead to make sure that they fit, and also stay, in the receiver track. The available bead types for your above ground liner are shown below.
Expandable Liners
For Overlap above ground Round swimming pools that also have a hopper (deeper section) you will need to choose the Expandable above ground round swimming pool liner product item for your 21′ round pool. Expandable liners are generally made to fit pools up to 72″ deep.
