Water flow regulation

1. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a shaft, a crown and a spring that biases the crown into engagement with the valve seat, wherein the crown is received on and slidable along the shaft;

an abutment surface situated to engage an end of the spring distal from the crown, wherein the abutment surface is moveable along a direction at the oblique angle relative to the direction of fluid flow, wherein the abutment surface is on a disk that is movable along the shaft; and

an adjustor oriented at least partially along the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment surface relative to the crown and the shaft.

2. The flow regulation valve of claim 1 , wherein

the shaft of the poppet valve has an axis,

the crown is situated near one end of the shaft,

the spring is received around the shaft, and

the abutment surface is moveable along a direction parallel to the shaft.

3. The flow regulation valve of claim 1 , comprising a sleeve at least partially surrounding the poppet valve and oriented at the oblique angle, the abutment surface movable relative to the sleeve, the sleeve guiding movement of the abutment surface along a direction parallel to the oblique angle.

4. The flow regulation valve of claim 1 , wherein

the shaft is threaded,

the disk has a central opening that is threaded, and

the adjustor rotates the shaft to cause the disk to move relative to the shaft.

5. The flow regulation valve of claim 4 , comprising at least one guide that engages the disk to prevent rotational movement of the disk and to allow longitudinal movement of the disk along the shaft.

6. The flow regulation valve of claim 5 wherein the at least one guide includes at least one support rod, wherein the at least one support rod is elongated in a direction parallel to the shaft, wherein the disk is slidably mounted on the at least one support rod to move linearly along the at least one support rod.

7. The flow regulation valve of claim 6 wherein the at least one support rod includes two support rods, each elongated in a direction parallel to the shaft, wherein the disk is slidably mounted on the two support rods to move linearly along the two support rods.

8. The flow regulation valve of claim 4 wherein the shaft extends through the crown, and wherein the shaft extends through the disk.

9. The flow regulation valve of claim 1 , wherein the housing includes a first portion, a second portion oriented colinear with the first portion, and a third portion at an oblique angle to the second portion.

10. The flow regulation valve of claim 9 , wherein the poppet valve and the abutment surface are situated in the third portion.

11. The flow regulation valve of claim 9 , wherein:

the first portion and the second portion define a direction of fluid flow through the housing,

the valve seat is situated between the first portion and the second portion,

the crown isolates the second portion from the first portion when the crown engages the valve seat, and

the poppet valve does not reduce fluid flow through the first portion and the second portion when the crown is in a retracted position away from the valve seat.

12. The flow regulation valve of claim 1 wherein the shaft extends through the crown.

13. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a shaft, a crown and a spring that biases the crown into engagement with the valve seat;

an abutment surface situated to engage an end of the spring distal from the crown, wherein the abutment surface is moveable along a direction at the oblique angle relative to the direction of fluid flow, wherein the abutment surface is on a disk that is movable along the shaft;

an adjustor oriented at least partially alone the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment surface relative to the crown and the shaft; and

a sleeve at least partially surrounding the popper valve and oriented at the oblique angle, the sleeve guiding movement of the abutment surface along the direction parallel to the oblique angle, wherein the sleeve guides movement of the crown along a direction parallel to the oblique angle.

14. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a shaft, a crown and a spring that biases the crown into engagement with the valve seat;

an abutment surface situated to engage an end of the spring distal from the crown, wherein the abutment surface is moveable along a direction at the oblique angle relative to the direction of fluid flow, wherein the abutment surface is on a disk that is movable along the shaft;

an adjustor oriented at least partially alone the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment surface relative to the crown and the shaft; and

a sleeve at least partially surrounding the poppet valve and oriented at the oblique anble, the sleeve guiding movement of the abutment surface along the direction parallel to the oblique angle, wherein the sleeve is permeable and allows fluid flowing through the housing to flow through the sleeve.

15. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a poppet valve member slidable along a rod that extends through the poppet valve member, the poppet valve further including a spring that biases the poppet valve member into engagement with the valve seat;

an abutment surface situated to engage an end of the spring distal from the poppet valve member; and

an adjustor oriented at least partially alone the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment surface relative to the poppet valve member and relative to the rod.

16. The flow regulation valve of claim 15 further comprising at least one support rod, wherein the abutment member is slidably mounted on the at least one support rod to prevent rotational movement of the abutment member and to allow longitudinal movement of abutment member along the rod.

17. The flow regulation valve of claim 15 wherein another end of the spring is proximal to the poppet valve member.

18. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a poppet valve member and a spring that biases the poppet valve member into engagement with the valve seat;

an abutment member slidable along a rod and situated to engage an end of the spring distal from the poppet valve member;

an adjustor oriented at least partially alone the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment surface relative to the poppet valve member and relative to the rod, wherein rotation of the adjustor causes rotation of the rod; and

at least one support rod elongated in a direction parallel to the rod, wherein the abutment member is slidably mounted on the at least one support rod to prevent rotational movement of the abutment member and to allow longitudinal movement of abutment member along the rod.

19. The flow regulation valve of claim 18 wherein another end of the spring is proximal to the poppet valve member.

20. The flow reguolation of claim 18 wherein the rod is threaded, the abutment member has a central opening that is threaded, the rod threadably engages the central opening of the abutment member, and wherein rotation of the adjustor rotates the rod to cause the abutment member to move along the rod.

21. A flow regulation valve, comprising:

a housing including a valve seat within the housing, the housing defining a direction of fluid flow through the housing;

a poppet valve disposed in the housing and oriented at an oblique angle relative to the direction of fluid flow, the poppet valve including a poppet valve member and a spring that biases the poppet valve member into engagement with the valve seat;

an abutment member slidable along a rod and situated to engage an end of the spring distal from the poppet valve member; wherein the rod etendds through the poppet valve member; and

an adjustor oriented at least partially along the oblique angle, wherein the adjustor is accessible from outside the housing for selectively setting a tension on the spring by moving the abutment member relative to the poppet valve member and relative to the rod, wherein rotation of the adjustor causes rotation of the rod.