diff --git a/manifests/backend/pure.pp b/manifests/backend/pure.pp
index 89dfa386..dd1b74ea 100644
--- a/manifests/backend/pure.pp
+++ b/manifests/backend/pure.pp
@@ -33,18 +33,12 @@
 #
 # [*use_chap_auth*]
 #   (optional) Use authentication for iSCSI. Only affects the PureISCSIDriver.
-#   Defaults to False
+#   Defaults to $facts['os_service_default']
 #
 # [*use_multipath_for_image_xfer*]
 #   (optional) Use multipath when attaching the volume for image transfer.
 #   Defaults to True
 #
-# [*manage_volume_type*]
-#   (Optional) Whether or not manage Cinder Volume type.
-#   If set to true, a Cinder Volume type will be created
-#   with volume_backend_name=$volume_backend_name key/value.
-#   Defaults to false.
-#
 # [*image_volume_cache_enabled*]
 #   (Optional) Enable Cinder's image cache function for this backend.
 #   Defaults to True
@@ -97,6 +91,12 @@
 #   supersedes pure_iscsi_cidr.
 #   Defaults to $facts['os_service_default']
 #
+# [*manage_volume_type*]
+#   (Optional) Whether or not manage Cinder Volume type.
+#   If set to true, a Cinder Volume type will be created
+#   with volume_backend_name=$volume_backend_name key/value.
+#   Defaults to false.
+#
 # [*extra_options*]
 #   (optional) Hash of extra options to pass to the backend stanza.
 #   Defaults to: {}
@@ -110,9 +110,8 @@ define cinder::backend::pure(
   $backend_availability_zone                         = $facts['os_service_default'],
   $reserved_percentage                               = $facts['os_service_default'],
   Enum['iSCSI', 'FC', 'NVMe'] $pure_storage_protocol = 'iSCSI',
-  $use_chap_auth                                     = false,
+  $use_chap_auth                                     = $facts['os_service_default'],
   $use_multipath_for_image_xfer                      = true,
-  Boolean $manage_volume_type                        = false,
   $image_volume_cache_enabled                        = true,
   $image_volume_cache_max_size_gb                    = $facts['os_service_default'],
   $image_volume_cache_max_count                      = $facts['os_service_default'],
@@ -123,6 +122,7 @@ define cinder::backend::pure(
   $pure_nvme_cidr_list                               = $facts['os_service_default'],
   $pure_iscsi_cidr                                   = $facts['os_service_default'],
   $pure_iscsi_cidr_list                              = $facts['os_service_default'],
+  Boolean $manage_volume_type                        = false,
   Hash $extra_options                                = {},
 ) {
 
diff --git a/spec/defines/cinder_backend_pure_spec.rb b/spec/defines/cinder_backend_pure_spec.rb
index d1a4b46c..c93a3c83 100644
--- a/spec/defines/cinder_backend_pure_spec.rb
+++ b/spec/defines/cinder_backend_pure_spec.rb
@@ -26,7 +26,7 @@ describe 'cinder::backend::pure' do
         is_expected.to contain_cinder_config('pure/san_ip').with_value('127.0.0.2')
         is_expected.to contain_cinder_config('pure/pure_api_token').with_value('abc123def456ghi789')
         is_expected.to contain_cinder_config('pure/use_multipath_for_image_xfer').with_value('true')
-        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('false')
+        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_eradicate_on_delete').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_iscsi_cidr').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_iscsi_cidr_list').with_value('<SERVICE DEFAULT>')
@@ -77,7 +77,7 @@ describe 'cinder::backend::pure' do
         is_expected.to contain_cinder_config('pure/san_ip').with_value('127.0.0.2')
         is_expected.to contain_cinder_config('pure/pure_api_token').with_value('abc123def456ghi789')
         is_expected.to contain_cinder_config('pure/use_multipath_for_image_xfer').with_value('true')
-        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('false')
+        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_eradicate_on_delete').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_host_personality').with_value('<SERVICE DEFAULT>')
       }
@@ -98,7 +98,7 @@ describe 'cinder::backend::pure' do
         is_expected.to contain_cinder_config('pure/san_ip').with_value('127.0.0.2')
         is_expected.to contain_cinder_config('pure/pure_api_token').with_value('abc123def456ghi789')
         is_expected.to contain_cinder_config('pure/use_multipath_for_image_xfer').with_value('true')
-        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('false')
+        is_expected.to contain_cinder_config('pure/use_chap_auth').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_eradicate_on_delete').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_nvme_cidr').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('pure/pure_nvme_transport').with_value('<SERVICE DEFAULT>')